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Centaurs: NASA's WISE Finds Mysterious Centaurs May Be Comets
The true identity of
centaurs, the small
celestial bodies orbiting
the sun between Jupiter and
Neptune, is one of the
enduring mysteries of
... > full story
'International Beam Team' Solves Martian Meteorite-Age Puzzle
By directing energy beams at
tiny crystals found in a
Martian meteorite,
geologists have proven that
the most common group of
meteorites from Mars is
... > full story
Newly Discovered Flux in Earth May Solve Missing-Mantle Mystery
Researchers have identified
a "hidden flux" of material
in Earth's mantle that would
make the planet's overall
composition much more
similar to that of
... > full story
Earth's Core Affects Length of Day
Researchers have found that
variations in the length of
day over periods of between
one and 10 years are caused
by processes in the Earth's
core. ... > full story
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New Insights Into the Early Bombardment History on Mercury
July 5, 2013 — Astronomers have studied the surface of Mercury to better understand if the plains were formed by volcanic flows or composed of material ejected from the planet's giant impact ... > full story -
Comet ISON Brings Holiday Fireworks
July 2, 2013 — Superficially resembling a skyrocket, Comet ISON is hurtling toward the Sun at 48,000 miles per hour. In May 2013, the comet was 403 million miles from Earth, between the orbits of Mars and ... > full story -
Sterilizing Mars Spacecraft Is Largely a Waste of Money, Two Experts Argue
June 27, 2013 — Two university researchers say environmental restrictions have become unnecessarily restrictive and expensive -- on ... > full story -
Ten Thousandth Near-Earth Object Discovered in Space
June 25, 2013 — More than 10,000 asteroids and comets that can pass near Earth have now been discovered. The 10,000th near-Earth object, asteroid 2013 MZ5, was first detected on the night of June 18, 2013, by the ... > full story -
Metamorphosis of Moon's Water Ice Explained
June 19, 2013 — Using data gathered by NASA's Lunar Reconnaissance Orbiter mission, scientists believe they have solved a mystery from one of the solar system's coldest regions -- a permanently shadowed crater on ... > full story -
Mars Had Oxygen-Rich Atmosphere 4,000 Million Years Ago
June 19, 2013 — Differences between Martian meteorites and rocks examined by a NASA rover can be explained if Mars had an oxygen-rich atmosphere 4,000 million years ago -- well before the rise of atmospheric oxygen ... > full story -
Asteroids, Comets and Meteors
NASA
Space Policy
Space Exploration
Near-Earth Object Impacts
Space Missions
Finding All Asteroid Threats to Human Populations: NASA Announces Asteroid Grand Challenge
June 18, 2013 — NASA has announced a Grand Challenge focused on finding all asteroid threats to human populations and knowing what to do about them. The challenge is a large-scale effort that will use ... > full story -
Moon Radiation Findings May Reduce Health Risks to Astronauts
June 11, 2013 — Space scientists report that data gathered by NASA's Lunar Reconnaissance Orbiter show lighter materials like plastics provide effective shielding against the radiation hazards faced by astronauts ... > full story -
Martian Clay Contains Chemical Implicated in the Origin of Life, Astrobiologists Find
June 10, 2013 — Researchers have discovered high concentrations of boron in a Martian meteorite. When present in its oxidized form (borate), boron may have played a key role in the formation of RNA, one of the ... > full story -
New Theory Proposes Solution to Long-Running Debate as to How Stable the Earth System Is
June 10, 2013 — Researchers have proposed an answer to the long-running debate as to how stable the Earth system is. Earth, with its core-driven magnetic field, oceans of liquid water, dynamic climate and abundant ... > full story
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