2013

• 5/9/2013 STScI-2013-18 1. Hubble Finds Dead Stars 'Polluted' with Planet Debris Deep inside the Hyades star cluster, a pair of burned-out stars are yielding clues to the presence of rocky planets that may have whirled around them. Asteroid... (More)
• 4/23/2013 STScI-2013-14 2. Hubble Captures Comet ISON Comet ISON is potentially the "comet of the century" because around the time the comet makes its closest approach to the Sun, on November 28, it may briefly become brighter than the full Moon. (More)

2012

• 11/1/2012 STScI-2012-44 3. Asteroid Belts of Just the Right Size are Friendly to Life Solar systems with life-bearing planets may be rare if they are dependent on the presence of asteroid belts of just the right mass, according... (More)
• 7/11/2012 STScI-2012-32 4. Hubble Discovers a Fifth Moon Orbiting Pluto A team of astronomers using NASA's Hubble Space Telescope is reporting the discovery of another moon orbiting the icy dwarf planet Pluto. The moon is estimated to be irregular... (More)
• 5/4/2012 STScI-2012-22 5. Hubble to Use Moon as Mirror to See Venus Transit This mottled landscape showing the impact crater Tycho is among the most violent-looking places on our Moon. Astronomers... (More)
• 4/19/2012 STScI-2012-21 6. Hubble Spots Aurorae on the Planet Uranus These are among the first clear images, taken from the distance of Earth, to show aurorae on the planet Uranus. This composite image combines 2011 Hubble observations... (More)

2011

• 7/20/2011 STScI-2011-23 7. NASA's Hubble Discovers Another Moon Around Pluto These two images, taken about a week apart by NASA's Hubble Space Telescope, show four moons orbiting the distant, icy dwarf planet Pluto. The green circle in both snapshots... (More)
• 7/12/2011 STScI-2011-19 8. Neptune Completes Its First Circuit Around The Sun Since Its Discovery These four images of Neptune were taken by NASA's Hubble Space Telescope during the planet's 16-hour rotation. The snapshots were taken at roughly... (More)
• 4/28/2011 STScI-2011-13 9. NASA's SWIFT and Hubble Probe Asteroid Collision Debris Late last year, astronomers noticed an asteroid named Scheila had unexpectedly brightened, and it was sporting short-lived plumes. Data from NASA's Swift satellite... (More)

2010

• 10/13/2010 STScI-2010-34 10. Hubble Finds that a Bizarre X-Shaped Intruder Is Linked to an Unseen Asteroid Collision Last January astronomers thought they had witnessed a fresh collision between two asteroids... (More)
• 10/8/2010 STScI-2010-33 11. NASA Mission to Asteroid Gets Help from Hubble Space Telescope NASA's Hubble Space Telescope has captured images of the large asteroid Vesta that will help scientists refine plans for the Dawn spacecraft's rendezvous... (More)
• 10/5/2010 STScI-2010-35 12. Hubble Probes Comet 103P/Hartley 2 in Preparation for DIXI/EPOXI Flyby Hubble Space Telescope observations of comet 103P/Hartley 2, taken on September 25, are helping in the planning for a November... (More)
• 9/13/2010 STScI-2010-32 13. Hubble Harvests Distant Solar System Objects This is an artist's concept of a craggy piece of solar system debris that belongs to a class of bodies called trans-Neptunian objects (TNOs). (More)
• 6/16/2010 STScI-2010-20 14. Mysterious Flash on Jupiter Left No Debris Cloud Detailed observations made by the Wide Field Camera 3 on NASA's Hubble Space Telescope have found an answer to the flash of light seen June 3 on Jupiter. (More)
• 6/3/2010 STScI-2010-16 15. Hubble Images Suggest Rogue Asteroid Smacked Jupiter Without warning, a mystery object struck Jupiter on July 19, 2009, leaving a dark bruise the size of the Pacific Ocean. The spot first caught the eye of an amateur astronomer... (More)
• 2/15/2010 STScI-2010-09 16. Hubble Captures Saturn's Double Light Show In January and March 2009, astronomers using NASA's Hubble Space Telescope took advantage of a rare opportunity to record Saturn when its rings were edge-on, resulting... (More)
• 2/4/2010 STScI-2010-06 17. New Hubble Maps of Pluto Show Surface Changes Since its discovery in 1930, Pluto has been a speck of light in the largest ground-based telescopes. But NASA's Hubble Space Telescope... (More)
• 2/2/2010 STScI-2010-07 18. Suspected Asteroid Collision Leaves Odd X-Pattern of Trailing Debris Something awfully curious is happening 100 million miles from Earth in the asteroid belt. There's a newly discovered object that superficially... (More)

2009

• 12/16/2009 STScI-2009-33 19. Hubble Finds Smallest Kuiper Belt Object Ever Seen NASA's Hubble Space Telescope has discovered the smallest object ever seen in visible light in the Kuiper Belt, a vast ring of icy debris that is encircling... (More)
• 10/9/2009 STScI-2009-26 20. Hubble Observes LCROSS Impact Event NASA's Hubble Space Telescope has made a series of observations immediately preceding and following the Lunar Crater Observation and Sensing Satellite (LCROSS) Centaur... (More)
• 9/9/2009 STScI-2009-25 21. Hubble Opens New Eyes on the Universe NASA's Hubble Space Telescope is back in business, ready to uncover new worlds, peer ever deeper into space, and even map the invisible backbone of the universe. (More)
• 7/24/2009 STScI-2009-23 22. Hubble Captures Rare Jupiter Collision NASA scientists have interrupted the checkout and calibration of the Hubble Space Telescope to aim the recently refurbished observatory at a new expanding spot on the giant planet Jupiter. (More)
• 3/17/2009 STScI-2009-12 23. Quadruple Saturn Moon Transit Snapped by Hubble Saturn's comparatively paper-thin rings are tilted edge on to Earth every 15 years. Because the orbits of Saturn's major satellites are in the ring plane, too, this alignment... (More)

2008

• 12/18/2008 STScI-2008-42 24. Hubble Catches Jupiter's Largest Moon Going to the 'Dark Side' NASA's Hubble Space Telescope has caught Jupiter's moon Ganymede playing a game of "peek-a-boo." In this crisp Hubble image, Ganymede... (More)
• 7/17/2008 STScI-2008-27 25. Three Red Spots Mix it Up on Jupiter This sequence of Hubble Space Telescope images offers an unprecedented view of a planetary game of Pac-Man among three red spots clustered together in Jupiter's atmosphere. (More)
• 5/22/2008 STScI-2008-23 26. New Red Spot Appears on Jupiter In what's beginning to look like a case of planetary measles, a third red spot has appeared alongside its cousins — the Great Red Spot and Red Spot Jr. — in the turbulent... (More)
• 1/23/2008 STScI-2008-06 27. Internal Heat Drives Jupiter's Giant Storm Eruption Detailed analysis of two continent-sized storms that erupted in Jupiter's atmosphere in March 2007 shows that Jupiter's internal heat plays a significant role in generating... (More)

2007

• 12/18/2007 STScI-2007-45 28. Mars: Closest Approach 2007 NASA's Hubble Space Telescope took this close-up of the red planet Mars when it was just 55 million miles – 88 million kilometers – away. This color image was assembled from a series of exposures... (More)
• 11/15/2007 STScI-2007-40 29. Hubble Zooms In on Heart of Mystery Comet NASA's Hubble Space Telescope has probed the bright core of Comet 17P/Holmes, which, to the delight of sky watchers, mysteriously brightened by nearly a millionfold... (More)
• 8/23/2007 STScI-2007-32 30. Going, Going, Gone: Hubble Captures Uranus's Rings on Edge This series of images from NASA's Hubble Space Telescope shows how the ring system around the distant planet Uranus appears at ever more oblique (shallower)... (More)
• 6/28/2007 STScI-2007-25 31. Hubble Catches Jupiter Changing Its Stripes Massive Jupiter is undergoing dramatic atmospheric changes that have never been seen before with the keen "eye" of NASA's Hubble Space Telescope. (More)
• 6/20/2007 STScI-2007-27 32. Hubble Images of Asteroids Help Astronomers Prepare for Spacecraft Visit These Hubble Space Telescope images of Vesta and Ceres show two of the most massive asteroids in the asteroid belt, a region between Mars and Jupiter. (More)
• 6/14/2007 STScI-2007-24 33. Astronomers Measure Mass of Largest Dwarf Planet NASA's Hubble Space Telescope has teamed up with the W.M. Keck Observatory to precisely measure the mass of Eris, the largest member of a new class of dwarf planets... (More)
• 3/20/2007 STScI-2007-13 34. Saturn Stars in Three Hubble Movies Photogenic Saturn has now become a movie star. Astronomers have woven NASA Hubble Space Telescope images of Saturn, its rings, and several of its moons into three movies. (More)
• 3/1/2007 STScI-2007-11 35. Hubble Monitors Jupiter in Support of the New Horizons Flyby NASA's Hubble Space Telescope has recently taken images of Jupiter in support of the New Horizons Mission. The images were taken with Hubble's... (More)

2006

• 9/28/2006 STScI-2006-47 36. Hubble Discovers Dark Cloud in the Atmosphere of Uranus Just as we near the end of the hurricane season in the Atlantic Ocean, winds whirl and clouds churn 2 billion miles away in the atmosphere of Uranus, forming... (More)
• 8/31/2006 STScI-2006-42 37. Hubble Captures a Rare Eclipse on Uranus This NASA Hubble Space Telescope image is a never-before-seen astronomical alignment of a moon traversing the face of Uranus, and its accompanying shadow. (More)
• 6/22/2006 STScI-2006-29 38. Pluto's Two Small Moons Officially Named Nix and Hydra A pair of small moons that NASA's Hubble Space Telescope discovered orbiting Pluto now have official names: Nix and Hydra. Photographed... (More)
• 5/4/2006 STScI-2006-19 39. Hubble Snaps Baby Pictures of Jupiter's "Red Spot Jr." NASA's Hubble Space Telescope is giving astronomers their most detailed view yet of a second red spot emerging on Jupiter. For the first time in history, astronomers... (More)
• 4/27/2006 STScI-2006-18 40. Hubble Provides Spectacular Detail of a Comet's Breakup Hubble Space Telescope is providing astronomers with extraordinary views of Comet 73P/Schwassmann-Wachmann 3. The fragile comet is rapidly disintegrating as it approaches... (More)
• 4/11/2006 STScI-2006-16 41. Hubble Finds 'Tenth Planet' is Slightly Larger than Pluto NASA's Hubble Space Telescope has resolved the "tenth planet," nicknamed "Xena," for the first time and has found... (More)
• 3/10/2006 STScI-2006-15 42. Hubble's Latest Look at Pluto's Moons Supports a Common Birth The latest NASA Hubble Space Telescope images of Pluto's two newly discovered satellites reveal that the new moons have the same color as Charon. (More)
• 2/22/2006 STScI-2006-09 43. Hubble Confirms New Moons of Pluto Astronomers using NASA's Hubble Space Telescope have confirmed the presence of two new moons around the distant planet Pluto. The moons were first discovered... (More)

2005

• 12/22/2005 STScI-2005-33 44. NASA's Hubble Discovers New Rings and Moons Around Uranus Even though the Voyager 2 spacecraft paid a close-up visit to Uranus in 1986, the distant planet continues revealing surprises... (More)
• 11/3/2005 STScI-2005-34 45. Mars Kicks Up the Dust as it Makes Closest Approach to Earth NASA's Hubble Space Telescope snapped this picture of Mars on October 28, within a day of its closest approach... (More)
• 10/31/2005 STScI-2005-19 46. NASA's Hubble Reveals Possible New Moons Around Pluto NASA's Hubble Space Telescope has spotted two possible new moons orbiting Pluto, the ninth planet in our solar system. If confirmed, the candidate moons could provide... (More)
• 10/19/2005 STScI-2005-29 47. NASA's Hubble Looks for Possible Moon Resources NASA has enlisted the Hubble Space Telescope's unique "vision" capabilities for making a new class of science observations of the Moon that support future human exploration. (More)
• 9/7/2005 STScI-2005-27 48. Largest Asteroid May Be 'Mini Planet' with Water Ice Observations of Ceres, the largest known asteroid, have revealed that the object may be a "mini planet," sharing many characteristics of the rocky, terrestrial... (More)
• 9/1/2005 STScI-2005-22 49. Hubble Makes Movie of Neptune's Dynamic Atmosphere NASA's Hubble Space Telescope captures the distant blue-green world, Neptune, and its satellites in this portrait. Astronomers used Hubble’s assortment of filters to pinpoint... (More)
• 7/4/2005 STScI-2005-17 50. Hubble Captures Deep Impact's Collision with Comet NASA's Hubble Space Telescope captured the dramatic effects of the collision early July 4 between an 820-pound projectile released by the Deep Impact spacecraft... (More)
• 6/27/2005 STScI-2005-16 51. Hubble Captures Outburst from Comet Targeted By Deep Impact In a dress rehearsal for the rendezvous between NASA's Deep Impact spacecraft and comet 9P/Tempel 1, the Hubble Space Telescope captured dramatic... (More)
• 6/2/2005 STScI-2005-18 52. NASA's Space Eyes Focus on Deep Impact Target On July 4, NASA's Deep Impact spacecraft will attempt an extraordinarily daring encounter with the far-flung comet Tempel 1 hurtling through space at tens of thousands... (More)
• 2/16/2005 STScI-2005-06 53. Saturn's Auroras Defy Scientists' Expectations The dancing light of the auroras on Saturn behaves in ways different from how scientists have thought possible for the last 25 years. New research by a team of astronomers... (More)

2004

• 11/11/2004 STScI-2004-31 54. Hubble Tracks Asteroid's Sky Trek While analyzing NASA Hubble Space Telescope images of the Sagittarius dwarf irregular galaxy (SagDIG), an international team of astronomers led by Simone Marchi, Yazan Momany... (More)
• 11/4/2004 STScI-2004-30 55. Hubble Spots Rare Triple Eclipse on Jupiter At first glance, Jupiter looks like it has a mild case of the measles. Five spots – one colored white, one blue, and three black – are scattered... (More)
• 6/17/2004 STScI-2004-52 56. A Really Neat Close-up of Comet NEAT from Kitt Peak Observatory This image of comet C/2001 Q4 (NEAT) was taken at the WIYN 0.9-meter telescope at Kitt Peak National Observatory near Tucson... (More)
• 5/26/2004 STScI-2004-18 57. Saturn Seen from Far and Near As Saturn grows closer through the eyes of the Cassini spacecraft, which is hurtling toward a rendezvous with the ringed world on June 30 (July 1, Universal Time), both Cassini... (More)
• 4/14/2004 STScI-2004-14 58. Hubble Observes Planetoid Sedna, Mystery Deepens Astronomers poring over 35 NASA Hubble Space Telescope images of the solar system's farthest known object, unofficially named Sedna, are surprised... (More)
• 1/22/2004 STScI-2004-05 59. The Colorful Lives of the Outer Planets Atmospheric features on Uranus and Neptune are revealed in images taken with the Space Telescope Imaging Spectrograph and the Advanced Camera for Surveys... (More)

2003

• 9/25/2003 STScI-2003-29 60. Hubble Uncovers Smallest Moons Yet Seen Around Uranus Astronomers have discovered two of the smallest moons yet found around Uranus. The new moons, uncovered by NASA's Hubble Space Telescope... (More)
• 9/9/2003 STScI-2003-23 61. The Slant on Saturn's Rings This is a series of images of Saturn, as seen at many different wavelengths, when the planet's rings were at their maximum tilt of 27 degrees toward Earth. Saturn experiences seasonal... (More)
• 9/6/2003 STScI-2003-25 62. Farthest, Faintest Solar System Objects Found Beyond Neptune Astronomers using NASA's Hubble Space Telescope have discovered three of the faintest and smallest objects ever detected beyond Neptune. (More)
• 9/5/2003 STScI-2003-26 63. Hubble Assists Rosetta Comet Mission Results from NASA's Hubble Space Telescope played a major role in preparing ESA's ambitious Rosetta mission for its new target, comet 67P/Churyumov-Gerasimenko (67P/C-G). (More)
• 8/27/2003 STScI-2003-22 64. Mars: Closest Encounter These two images, taken 11 hours apart with NASA's Hubble Space Telescope, reveal two nearly opposite sides of Mars. Hubble snapped these photos as the red planet was making its closest approach... (More)
• 5/15/2003 STScI-2003-17 65. Brighter Neptune Suggests a Planetary Change of Seasons Springtime is blooming on Neptune! This might sound like an oxymoron because Neptune is the farthest and coldest of the major planets. But observations... (More)

2002

• 10/7/2002 STScI-2002-17 66. Hubble Spots an Icy World Far Beyond Pluto NASA's Hubble Space Telescope has measured the largest object discovered in the solar system since the discovery of Pluto 72 years ago. Approximately... (More)
• 4/17/2002 STScI-2002-04 67. Hubble Hunts Down Binary Objects at the Fringe of Our Solar System The Hubble Space Telescope is hot on the trail of a puzzling new class of solar system object that might be called a Pluto "mini-me."... (More)

2001

• 10/11/2001 STScI-2001-31 68. Scientists Track "Perfect Storm" on Mars A pair of eagle-eyed NASA spacecraft — the Mars Global Surveyor (MGS) and Hubble Space Telescope — are giving amazed astronomers a ringside seat to the biggest... (More)
• 7/5/2001 STScI-2001-24 69. Hubble Captures Best View of Mars Ever Obtained From Earth Frosty white water ice clouds and swirling orange dust storms above a vivid rusty landscape reveal Mars as a dynamic planet in this sharpest... (More)
• 6/7/2001 STScI-2001-15 70. A Change of Seasons on Saturn Looming like a giant flying saucer in our outer solar system, Saturn puts on a show as the planet and its magnificent ring system nod majestically over the course of its 29-year... (More)
• 5/17/2001 STScI-2001-14 71. Astronomers Puzzled over Comet LINEAR's Missing Pieces Astronomers analyzing debris from a comet that broke apart last summer spied pieces as small as smoke-sized particles and as large as football-field-sized fragments. (More)

2000

• 12/14/2000 STScI-2000-38 72. Satellite Footprints Seen in Jupiter Aurora In this Hubble telescope picture, a curtain of glowing gas is wrapped around Jupiter's north pole like a lasso. This curtain of light, called an aurora, is produced when high-energy... (More)
• 9/14/2000 STScI-2000-31 73. Centaur's Bright Surface Spot Could be Crater of Fresh Ice The unexpectedly varied surface of a wayward piece of space debris has given astronomers new insights into the characteristics and behavior of a ghostly... (More)
• 8/7/2000 STScI-2000-27 74. Hubble Discovers Missing Pieces of Comet Linear To the surprise and delight of astronomers, the Hubble telescope discovered a small armada of "mini-comets" left behind from what some scientists had prematurely thought... (More)
• 7/28/2000 STScI-2000-26 75. Hubble Sees Comet Linear Blow its Top Lackluster comet LINEAR (C/1999 S4) unexpectedly threw astronomers a curve. Using the Hubble telescope, researchers were surprised to catch the icy comet in a brief, violent... (More)

1999

• 8/5/1999 STScI-1999-29 76. Hubble Views Ancient Storm in the Atmosphere of Jupiter When 17th-century astronomers first turned their telescopes to Jupiter, they noted a conspicuous reddish spot on the giant planet. (More)
• 6/30/1999 STScI-1999-27 77. A Closer Encounter with Mars Taking advantage of Mars's closest approach to Earth in eight years, astronomers using the Hubble telescope have taken the space-based observatory's sharpest views yet of the Red Planet. (More)
• 5/19/1999 STScI-1999-22 78. Colossal Cyclone Swirls near Martian North Pole Astronomers using the Hubble telescope have discovered an enormous cyclonic storm system raging in the northern polar regions of the planet Mars. (More)
• 4/20/1999 STScI-1999-13 79. Hubble Clicks Images of Io Sweeping across Jupiter While hunting for volcanic plumes on Io, the Hubble telescope captured these images of the volatile moon sweeping across the giant face of Jupiter. (More)
• 4/16/1999 STScI-1999-14 80. Hubble Shoots the Moon In a change of venue from peering at the distant universe, the Hubble telescope has taken a look at Earth's closest neighbor in space, the Moon. Hubble was aimed at one of the Moon's most dramatic... (More)
• 3/29/1999 STScI-1999-11 81. Huge Spring Storms Rouse Uranus from Winter Hibernation If springtime on Earth were anything like it will be on Uranus, we would be experiencing waves of massive storms, each one covering the country... (More)
• 3/4/1999 STScI-1999-08 82. A Mote in Hubble's Eye The Hubble telescope image is a typical Milky Way star field in the constellation Centaurus. Such snapshots can be used to study the evolution of stars that make up our galaxy. (More)
• 2/25/1999 STScI-1999-07 83. Martian Colors Provide Clues about Martian Water Hubble telescope images of Mars detail a rich geologic history and provide further evidence for water-bearing minerals on the planet's surface. (More)

1998

• 10/21/1998 STScI-1998-28 84. Astronomers Unveil Colorful Hubble Photo Gallery A vibrant celestial photo album of some of NASA Hubble Space Telescope's most stunning views of the universe is being unveiled today on the Internet. Called the Hubble Heritage... (More)
• 10/14/1998 STScI-1998-34 85. Hubble Provides a Moving Look at Neptune's Stormy Disposition Using powerful ground- and space-based telescopes, scientists have obtained a moving look at some of the wildest, weirdest weather in the solar system. ... (More)
• 10/14/1998 STScI-1998-35 86. Hubble Finds Many Bright Clouds on Uranus A Hubble telescope infrared view of Uranus reveals that the planet is surrounded by its four major rings and by 10 of its 17 known satellites. ... (More)
• 6/24/1998 STScI-1998-23 87. Hubble Space Telescope Helps Find Evidence that Neptune's Largest Moon Is Warming Up Observations obtained by the Hubble telescope and ground-based instruments reveal that Neptune's largest moon, Triton... (More)
• 4/23/1998 STScI-1998-18 88. Hubble Space Telescope Completes Eighth Year Of Exploration In honor of NASA Hubble Space Telescope's eighth anniversary, we have gift-wrapped Saturn in vivid colors. Actually, this image is courtesy of Hubble's infrared camera... (More)
• 3/27/1998 STScI-1998-13 89. Comet Hyakutake The Hubble telescope has probed the inner regions of Comet Hyakutake. This picture captures sunlight scattered by dust particles in the comet's inner coma. ... (More)
• 3/9/1998 STScI-1998-10 90. Astronomers Track Down Asteroids in Hubble Archive Astronomers have stumbled on an unusual asteroid hunting ground: the thousands of Hubble telescope images stored in the orbiting observatory's archive. ... (More)
• 1/7/1998 STScI-1998-05 91. Hubble Provides Clear Images of Saturn's Aurora Here is the picture of Saturn taken by the Hubble telescope in ultraviolet light. The glowing, swirling material at Saturn's poles is its auroral "curtains,"... (More)
• 1/7/1998 STScI-1998-04 92. Hubble Provide Complete View of Jupiter's Auroras The Hubble telescope has captured a complete view of Jupiter's northern and southern auroras. Images taken in ultraviolet light show both auroras, the oval-shaped objects... (More)

1997

• 11/20/1997 STScI-1997-37 93. Hubble Provides Infrared View of Moon, Ring, and Clouds Probing Jupiter's atmosphere for the first time, the Hubble telescope's infrared camera is providing a sharp glimpse of the planet's ring, moon, and high-altitude... (More)
• 11/20/1997 STScI-1997-36 94. Hubble Watches Uranus Using the Hubble telescope's visible-light camera, astronomers for the first time this century have detected clouds in the Northern Hemisphere of Uranus. The snapshots show banded structure... (More)
• 9/17/1997 STScI-1997-31 95. Hubble Watches the Red Planet as Mars Global Surveyor Begins Aerobraking This Hubble telescope picture of Mars was taken Sept. 12, 1997, one day after the arrival of the Mars Global Surveyor (MGS) spacecraft... (More)
• 9/4/1997 STScI-1997-27 96. Hubble Reveals Huge Crater on the Surface of the Asteroid Vesta Astronomers have used the Hubble Space telescope to discover a giant impact crater on the asteroid Vesta. (More)
• 7/15/1997 STScI-1997-24 97. Hubble Sees Rapid Weather Changes On Mars, New Dust Activity Astronomers using the Hubble telescope to track weather on Mars and how it might affect the Pathfinder landing... (More)
• 7/1/1997 STScI-1997-23 98. Hubble's Look At Mars Shows Canyon Dust Storm, Cloudy Conditions For Pathfinder Landing Hubble telescope pictures of Mars, taken June 27, 1997 in preparation for the July 4 landing of the Pathfinder spacecraft... (More)
• 6/19/1997 STScI-1997-21 99. Hubble Captures Volcanic Eruption Plume From Io The Hubble telescope has snapped a picture of a 400-kilometer-high (250-mile-high) plume of gas and dust from a volcanic eruption on Io, Jupiter's large, innermost moon. (More)
• 5/20/1997 STScI-1997-15 100. Hubble Finds Cloudy, Cold Weather Conditions for Mars-Bound Spacecraft As two NASA spacecraft speed toward a mid-year rendezvous with Mars, astronomers using the Hubble telescope are providing updated planetary weather reports... (More)