Category: Planetary Science
29 April 1998
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ScienceNOW(Science - AAAS)
Early Planet Theory: Not Standing on Solid Ground
Forest Ray Moulton, an American astronomer known for a dominant early theory on how planets form, was born on this day in 1872. Moulton and Thomas Chrowder Chamberlin proposed in...
28 April 1998
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ScienceNOW(Science - AAAS)
Solar Tornadoes
Vast tornadoes ravage the sun at speeds up to 200,000 kilometers per hour, astronomers reported today at a meeting at Rutherford Appleton Laboratory (RAL) near Oxford, U.K., celebrating the extension...
7 April 1998
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ScienceNOW(Science - AAAS)
Jupiter's Dusty Doughnut Spins Backward
Astronomers have detected a new ring of tiny dust particles circling Jupiter. The ring is unique in the solar system, because most of the dust seems to be orbiting backward--in...
1 April 1998
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ScienceNOW(Science - AAAS)
French Plan to Sample Mars, Solar Wind
Mars looms large in the future of the French space agency CNES, which yesterday held a press conference in Paris to unveil its plans for the next decade. Mars Express,...
12 March 1998
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ScienceNOW(Science - AAAS)
Asteroid Won't Hit Earth
Doomsday asteroid watchers can relax. A reanalysis of the orbit of a large asteroid headed for a close encounter with Earth in 30 years (ScienceNOW, 11 March) predicts no chance...
11 March 1998
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ScienceNOW(Science - AAAS)
Asteroid Headed for Earth
Astronomers are tracking an asteroid, at least 1 kilometer wide, that could hit Earth in 2028. The orbit of the massive asteroid, known as 1997 XF11, was posted today on...
9 March 1998
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ScienceNOW(Science - AAAS)
Tuning In to a Distant Planet
The French astronomer who co-discovered the planet Neptune, Urbain Jean Joseph Leverrier, was born on this day in 1811. Based on hints that Uranus veered slightly from the orbit predicted...
5 March 1998
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ScienceNOW(Science - AAAS)
Water on the Moon
WASHINGTON, D.C.--A spacecraft has found "significant deposits of water ice at both poles of the moon," scientists announced at a press conference here today after analyzing data from the first...
21 January 1998
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ScienceNOW(Science - AAAS)
NEAR Spacecraft to Flash by Earth
After having successfully reconnoitered its first asteroid last year, NASA's Near Earth Asteroid Rendezvous spacecraft, or NEAR, will flash into view late Thursday night and early Friday morning across much...
4 December 1997
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ScienceNOW(Science - AAAS)
Mars Life or Microscope Artifact?
The squiggly little forms in martian meteorite ALH48001 have been flashed around the world as evidence of extraterrestrial life. But in this week's Nature, a group of three meteoriticists argues...
3 December 1997
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ScienceNOW(Science - AAAS)
Sizing Up a Deadly Crater
The massive meteorite impact that may have doomed the dinosaurs apparently blasted out a crater much smaller than some scientists had thought. New measurements of the buried crater, reported in...
21 November 1997
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ScienceNOW(Science - AAAS)
Mars Express Gets Green Light
When a launcher for a Russian-led mission carrying the Mars '96 spacecraft exploded a year ago over the Pacific Ocean, it wiped out all plans for planetary exploration at the...
14 November 1997
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ScienceNOW(Science - AAAS)
Did Ice Clouds Dampen Mars?
The eroded canals and floodplains of Mars suggest that water once flowed freely on the red planet. Scientists have been stumped, however, about how the atmosphere could have ever retained...
11 November 1997
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ScienceNOW(Science - AAAS)
Mars for Sale
You don't have to be a martian or even Bill Gates to own a piece of Mars. In a full-page ad in the New York Times today, a New York...
3 November 1997
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ScienceNOW(Science - AAAS)
A Parting Shot for Cassini
Planetary scientists thought they had seen the last of the Saturn probe Cassini when it roared skyward on 15 October. But thanks to astronomers who usually hunt for asteroids, they...
17 October 1997
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ScienceNOW(Science - AAAS)
Earth Dance Brings Rain
Six thousand years ago, hippos lounged in lush land that is now the Sahara, and Lake Chad was as large as the Caspian Sea is today. But just how yesterday's...
10 October 1997
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ScienceNOW(Science - AAAS)
Cobblestones on Mars?
Researchers analyzing the latest close-up images of rocks from the Mars Pathfinder rover announced this week that they provide new evidence that the red planet had a warm, wet--and possibly...
2 October 1997
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ScienceNOW(Science - AAAS)
Magnetic Lava Legacy on Mars?
Mars Global Surveyor, the NASA probe that went into orbit around the Red Planet 12 September, has detected magnetic anomalies dotting Mars's crust, scientists announced today at a press conference...
30 September 1997
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ScienceNOW(Science - AAAS)
Particle Man
Today is the birthday of Hans Geiger, born in 1882, a German physicist known for the techniques he developed for detecting and counting charged particles. Geiger investigated the charge and...
24 September 1997
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ScienceNOW(Science - AAAS)
A More Violent Moon Birth?
It took an even bigger cataclysm to form the moon than researchers had thought, a new study suggests. The moon is thought to be the legacy of a jarring collision...
17 September 1997
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ScienceNOW(Science - AAAS)
Magnetic Mars
NASA's Global Surveyor has detected a magnetic field around Mars. While it's unlikely that the geologically inactive planet is generating a field the way Earth does, the discovery may lend...
10 September 1997
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ScienceNOW(Science - AAAS)
Probe Ready for Mars Orbit
NASA's Mars Global Surveyor spacecraft is poised to enter the orbit of the Red Planet on Thursday, and officials at the Jet Propulsion Laboratory (JPL) in Pasadena, California, today said...
30 July 1997
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ScienceNOW(Science - AAAS)
Big Splat on a Small Planet
BOSTON--Astronomers are used to seeing plenty of planetary mayhem, but the discovery of a 450-kilometer impact crater on the asteroid Vesta, which is only 525 kilometers in diameter, has them...
7 July 1997
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ScienceNOW(Science - AAAS)
Pathfinder Finds Clues to Great Flood
Planetary scientists studying the images relayed home by the Mars Pathfinder are finding signs that a great ancient flood on the Red Planet deposited rocks at the landing site, the...
24 June 1997
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ScienceNOW(Science - AAAS)
Rapid Collapse Gave Giant Planets Gas?
Some of our solar system's "gas giant" planets may have formed when clumps of gas and dust in the early solar system collapsed precipitously, in 1000 years or less, a...
29 May 1997
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ScienceNOW(Science - AAAS)
More Trouble for First Extrasolar Planet
A team of California astronomers has come up with new evidence disputing the existence of the first planetlike object found around a star like our sun. The putative planet, detected...
2 May 1997
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ScienceNOW(Science - AAAS)
Ice Age Theory Back in Stable Orbit
For nearly a decade, a cloud of suspicion has hung over the idea that fluctuations in Earth's orbit triggered the ice ages. But now scientists have developed a way to...
29 April 1997
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ScienceNOW(Science - AAAS)
Early Planet Theory: Not Standing on Solid Ground
Forest Ray Moulton, an American astronomer known for a dominant early theory on how planets form, was born on this day in 1872. Moulton and Thomas Chrowder Chamberlin proposed in...
9 April 1997
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ScienceNOW(Science - AAAS)
An Ocean--and a Possible Home for Life--on Europa
Planetary scientists reported today that they have persuasive evidence for a deep ocean below the icy surface of Jupiter's moon Europa. New images from the Galileo spacecraft show features that...
20 March 1997
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ScienceNOW(Science - AAAS)
Bacterial Muck on Mars?
HOUSTON--The authors of the life-on-Mars paper that rocked the world last summer (Science, 16 August 1996, p. 924) say they have found further evidence of past life in the famed...
13 March 1997
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ScienceNOW(Science - AAAS)
Mars Rock Cools Down, Life Debate Heats Up
The famous martian meteorite, ALH84001, may be cool enough for life again. After NASA scientists claimed last August to have found evidence of past life in carbonate intrusions in the...
11 March 1997
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ScienceNOW(Science - AAAS)
Tuning In to a Distant Planet
The French astronomer who co-discovered the planet Neptune, Urbain Jean Joseph Leverrier, was born on this day in 1811. Based on hints that Uranus veered slightly from the orbit predicted...
5 March 1997
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ScienceNOW(Science - AAAS)
A Hazy Sign of Distant Planets?
Long before astronomers detected possible planets around other stars, a hint that they might exist came from the 1984 discovery of a dusty ring around the star -Pictoris--perhaps the raw...
23 January 1997
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ScienceNOW(Science - AAAS)
Tribute to Pluto's Discoverer
A memorial service was held today at New Mexico State University for Clyde Tombaugh, the astronomer who discovered Pluto. Tombaugh died on 17 January at his home in Las Cruces....
17 January 1997
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ScienceNOW(Science - AAAS)
An Icy World Looks Livelier
Washington--The latest images of Jupiter's moon Europa, released here today at a NASA press conference, have planetary geologists in a tither. To team members poring over images returned by the...
15 January 1997
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ScienceNOW(Science - AAAS)
Leaving Your Mark on Saturn
If you think it's cool to send messages around the world with the click of a mouse, you might want to try sending one to the ringed planet. The European...
16 December 1996
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ScienceNOW(Science - AAAS)
New Hot-and-Fast Planets
The planetary freak show is getting so crowded it's hard to call them freaks anymore. An analysis of three new Jupiter-sized planets in tight orbits around their suns, presented in...
12 December 1996
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ScienceNOW(Science - AAAS)
A Hidden Ocean on One of Jupiter's Moons?
Washington--Images from Jupiter's moon Europa released at a NASA press conference here today are wowing planetary scientists, who believe they are seeing yet more signs that beneath Europa's icy surface...
3 December 1996
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ScienceNOW(Science - AAAS)
NASA Bound for Mars Again
WASHINGTON, D.C.--NASA hopes the third try will be the charm for the launch of Mars Pathfinder. High winds scrubbed the first attempt on Monday, and a computer glitch halted the...
20 November 1996
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ScienceNOW(Science - AAAS)
Life After Mars '96
Three days after their Mars '96 mission plunged into the Pacific Ocean, Russian space scientists say they have a good idea what probably went wrong. And they will make a...
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