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Icy Travelers
Comets are cosmic snowballs of frozen gases, rock and dust roughly the size of a small town. When a comet's orbit brings it close to the sun, it heats up and spews dust and gases into a giant glowing head larger than most planets. The dust and gases form a tail that stretches away from the sun for millions of kilometers.

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50 Years of Robotic Planetary Exploration: Yvonne Pendleton (Director at NASA's Lunar Science Institute)
50 Years of Robotic Planetary Exploration: Yvonne Pendleton (Director at NASA's Lunar Science Institute)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Michelle Thaller (Assistant Director of Science for Communications at the Goddard Space Flight Center)
50 Years of Robotic Planetary Exploration: Michelle Thaller (Assistant Director of Science for Communications at the Goddard Space Flight Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Mission to Land on a Comet
Mission to Land on a Comet
Europe's Rosetta spacecraft is en route to intercept a comet­--and to make history. In 2014, Rosetta will enter orbit around 67P/Churyumov-Gerasimenko and land a probe on it for a front row seat as the comet heads toward the heat of the sun.Read More...
Comet Corpses in the Solar Wind
Comet Corpses in the Solar Wind
A paper published in today's issue of Science raises an intriguing new possibility for astronomers: unearthing comet corpses in the solar wind. The new research is based on dramatic images of a comet disintegrating in the sun's atmosphere last July.Read More...
Ices of the Universe
Ices of the Universe
On January 24, 2011, Dr. Murthy Gudipati, scientist at NASA's Jet Propulsion Laboratory presented "Ices of the Universe," a lecture focusing on ices found in the solar system, including nitrogen ice on Triton, carbon dioxide ice on Mars, and moreRead More...
50 Years of Robotic Planetary Exploration: Peter Jenniskens (Research Scientist at the SETI Institute and NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: Peter Jenniskens (Research Scientist at the SETI Institute and NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Comet Lovejoy Plunges into the Sun ... and Survives
Comet Lovejoy Plunges into the Sun ... and Survives
Sungrazing Comet Lovejoy has shocked astronomers by surviving its "death plunge" into the sun. Must-see movies of the comet's passage through the sun's atmosphere are featured in today's story from Science@NASA.Read More...
Meteors from Halley's Comet
Meteors from Halley's Comet
Looking for an adventure? Get up in the wee hours of the morning May 6th and head out into the country, far from the city lights. You won't be alone. The birds will be up and singing about the coming dawn, and about the eta Aquarid meteor shower.Read More...
Stardust-NExT Mission Delivers Striking Images of Man-Made Crater on Comet Tempel 1
Stardust-NExT Mission Delivers Striking Images of Man-Made Crater on Comet Tempel 1
The spacecraft made its closest approach to Comet Tempel 1 on Monday, Feb. 14, at 8:40 p.m. PST (11:40 p.m. EST) at a distance of approximately 178 kilometers (111 miles). Stardust took 72 high-resolution images of the comet.Read More...
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Previous
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Next
    Show All
50 Years of Robotic Planetary Exploration: Yvonne Pendleton (Director at NASA's Lunar Science Institute)
50 Years of Robotic Planetary Exploration: Yvonne Pendleton (Director at NASA's Lunar Science Institute)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Michelle Thaller (Assistant Director of Science for Communications at the Goddard Space Flight Center)
50 Years of Robotic Planetary Exploration: Michelle Thaller (Assistant Director of Science for Communications at the Goddard Space Flight Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: Jeff Cuzzi (Research Scientist at NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Mission to Land on a Comet
Mission to Land on a Comet
Europe's Rosetta spacecraft is en route to intercept a comet­--and to make history. In 2014, Rosetta will enter orbit around 67P/Churyumov-Gerasimenko and land a probe on it for a front row seat as the comet heads toward the heat of the sun.Read More...
Comet Corpses in the Solar Wind
Comet Corpses in the Solar Wind
A paper published in today's issue of Science raises an intriguing new possibility for astronomers: unearthing comet corpses in the solar wind. The new research is based on dramatic images of a comet disintegrating in the sun's atmosphere last July.Read More...
Ices of the Universe
Ices of the Universe
On January 24, 2011, Dr. Murthy Gudipati, scientist at NASA's Jet Propulsion Laboratory presented "Ices of the Universe," a lecture focusing on ices found in the solar system, including nitrogen ice on Triton, carbon dioxide ice on Mars, and moreRead More...
50 Years of Robotic Planetary Exploration: Peter Jenniskens (Research Scientist at the SETI Institute and NASA Ames Research Center)
50 Years of Robotic Planetary Exploration: Peter Jenniskens (Research Scientist at the SETI Institute and NASA Ames Research Center)
We asked them and here is what the experts had to say about the last 50 years of planetary robotic exploration.Read More...
Comet Lovejoy Plunges into the Sun ... and Survives
Comet Lovejoy Plunges into the Sun ... and Survives
Sungrazing Comet Lovejoy has shocked astronomers by surviving its "death plunge" into the sun. Must-see movies of the comet's passage through the sun's atmosphere are featured in today's story from Science@NASA.Read More...
Meteors from Halley's Comet
Meteors from Halley's Comet
Looking for an adventure? Get up in the wee hours of the morning May 6th and head out into the country, far from the city lights. You won't be alone. The birds will be up and singing about the coming dawn, and about the eta Aquarid meteor shower.Read More...
Stardust-NExT Mission Delivers Striking Images of Man-Made Crater on Comet Tempel 1
Stardust-NExT Mission Delivers Striking Images of Man-Made Crater on Comet Tempel 1
The spacecraft made its closest approach to Comet Tempel 1 on Monday, Feb. 14, at 8:40 p.m. PST (11:40 p.m. EST) at a distance of approximately 178 kilometers (111 miles). Stardust took 72 high-resolution images of the comet.Read More...
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