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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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Comet ISON vs. the Solar Storm
Comet ISON vs. the Solar Storm
In 2007, astronomers were amazed when a solar storm hit comet Encke. The same thing could be in store for comet ISON -- only worse.Read More...
Two Comets to Fly By Mercury
Two Comets to Fly By Mercury
What are the odds? On Nov. 18th and 19th not one but two comets will fly by the planet Mercury.Read More...
Comet ISON: What's Next?
Comet ISON: What's Next?
Comet ISON is now inside the orbit of Earth as it plunges headlong toward the sun for a fiery close encounter on Nov. 28th. Although the comet is not yet as bright as many forecasters predicted, the comet is putting on a good show for observatories ...Read More...
Rosetta: 100 Days to Wake-Up
Rosetta: 100 Days to Wake-Up
ESA's comet-chasing mission Rosetta will wake up in 100 days' time from deep-space hibernation to reach the destination it has been cruising towards for a decade.Read More...
WHAT'S UP? Comet ISON and Things that go bump in the night
WHAT'S UP? Comet ISON and Things that go bump in the night
Once there were things in the sky that could not be predicted and were cause for great concern and fear. Now we know better.Read More...
Amateur Astronomers See Comet ISON
Amateur Astronomers See Comet ISON
Anticipation is building as Comet ISON approaches the sun for a close encounter on Thanksgiving Day (Nov. 28). No one knows if the blast of solar heating ISON receives will turn it into one of the finest comets in years -- or destroy the icy visitor.Read More...
BRRISON: A Planetary Science Balloon Mission
BRRISON: A Planetary Science Balloon Mission
This fall, NASA plans to launch a new balloon-based mission that will float to the edge of our atmosphere to observe a comet from the far reaches of the solar system.Read More...
Comet ISON to fly by Mars
Comet ISON to fly by Mars
Around the world, astronomers are buzzing with anticipation over the approach of Comet ISON.Read More...
A Timeline Of Comet ISON's Dangerous Journey
A Timeline Of Comet ISON's Dangerous Journey
A comet's journey through the solar system is perilous. Comet ISON is making that journey.Read More...
Comet ISON: What's in a Name?
Comet ISON: What's in a Name?
Credit for comet ISON's name goes to its discovers: Vitali Nevski and Artyom Novinchonok.Read More...
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Previous
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Previous
Previous
    1     2     3     4     5    
Next
    Show All
Comet ISON vs. the Solar Storm
Comet ISON vs. the Solar Storm
In 2007, astronomers were amazed when a solar storm hit comet Encke. The same thing could be in store for comet ISON -- only worse.Read More...
Two Comets to Fly By Mercury
Two Comets to Fly By Mercury
What are the odds? On Nov. 18th and 19th not one but two comets will fly by the planet Mercury.Read More...
Comet ISON: What's Next?
Comet ISON: What's Next?
Comet ISON is now inside the orbit of Earth as it plunges headlong toward the sun for a fiery close encounter on Nov. 28th. Although the comet is not yet as bright as many forecasters predicted, the comet is putting on a good show for observatories ...Read More...
Rosetta: 100 Days to Wake-Up
Rosetta: 100 Days to Wake-Up
ESA's comet-chasing mission Rosetta will wake up in 100 days' time from deep-space hibernation to reach the destination it has been cruising towards for a decade.Read More...
WHAT'S UP? Comet ISON and Things that go bump in the night
WHAT'S UP? Comet ISON and Things that go bump in the night
Once there were things in the sky that could not be predicted and were cause for great concern and fear. Now we know better.Read More...
Amateur Astronomers See Comet ISON
Amateur Astronomers See Comet ISON
Anticipation is building as Comet ISON approaches the sun for a close encounter on Thanksgiving Day (Nov. 28). No one knows if the blast of solar heating ISON receives will turn it into one of the finest comets in years -- or destroy the icy visitor.Read More...
BRRISON: A Planetary Science Balloon Mission
BRRISON: A Planetary Science Balloon Mission
This fall, NASA plans to launch a new balloon-based mission that will float to the edge of our atmosphere to observe a comet from the far reaches of the solar system.Read More...
Comet ISON to fly by Mars
Comet ISON to fly by Mars
Around the world, astronomers are buzzing with anticipation over the approach of Comet ISON.Read More...
A Timeline Of Comet ISON's Dangerous Journey
A Timeline Of Comet ISON's Dangerous Journey
A comet's journey through the solar system is perilous. Comet ISON is making that journey.Read More...
Comet ISON: What's in a Name?
Comet ISON: What's in a Name?
Credit for comet ISON's name goes to its discovers: Vitali Nevski and Artyom Novinchonok.Read More...
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