advertisement
Reference Terms
from Wikipedia, the free encyclopedia

Comet

A comet is a small body in the solar system that orbits the Sun and (at least occasionally) exhibits a coma (or atmosphere) and/or a tail - both primarily from the effects of solar radiation upon the comet's nucleus, which itself is a minor body composed of rock, dust, and ices.

Note:The above text is excerpted from the Wikipedia article "Comet", which has been released under theGNU Free Documentation License.
advertisement

Related Stories

advertisement


Space & Time News
August 30, 2023

磁星是最强的磁铁the Universe. These super-dense dead stars with ultra-strong magnetic fields can be found all over our galaxy but astronomers don't know exactly how they form. Now, using multiple telescopes around the world, ...
New observations of mud cracks made by the Curiosity Rover show that high-frequency, wet-dry cycling occurred in early Martian surface environments, indicating that the red planet may have once seen seasonal weather patterns or even flash ...
NASA's James Webb Space Telescope has recorded breath-taking new images of the iconic Ring Nebula, also known as Messier ...
Earth is rapidly warming and scientists are developing a variety of approaches to reduce the effects of climate change. An astronomer has proposed a novel approach -- a solar shield to reduce the amount of sunlight hitting Earth, combined with a ...
Latest Headlines
updated 12:56 pm ET