Comets - NASA Science
Comets are frozen leftovers from the formation of the solar system composed of dust, rock, and ices. They range from a few miles to tens of miles wide, but as they orbit closer to the Sun, they heat up and spew gases and dust into a glowing head that can be larger than a planet.
1P/Halley - NASA Science
Halley is often called the most famous comet because it marked the first time astronomers understood comets could be repeat visitors to our night skies. Astronomers have now linked the comet's appearances to observations dating back more than 2,000 years.
Comets: Facts - NASA Science
Scientists have long wanted to study comets in some detail, tantalized by the few 1986 images of comet Halley's nucleus. NASA's Deep Space 1 spacecraft flew by comet Borrelly in 2001 and photographed its nucleus, which is about 5 miles (8 kilometers) long.
What’s Up: October 2024 Skywatching Tips from NASA
The comet, known as C/2023 A3, aka Tsuchinshan-ATLAS, is currently speeding through the inner solar system. It passed its closest to the Sun in late September, and will be at its closest to Earth on October 13th.
Asteroids, Comets & Meteors - NASA Science
Explore the 3D world of asteroids, comets, and NEOs. Learn about past and future missions, tracking and predicting orbits, and close approaches to Earth. NASA/JPL-Caltech
Hubble Confirms Largest Comet Nucleus Ever Seen - Science@NASA
2022年4月12日 · NASA’s Hubble Space Telescope has determined the size of the largest icy comet nucleus ever seen by astronomers. The estimated diameter is approximately 80 miles across, making it larger than the state of Rhode Island.
Deep Impact (EPOXI) - NASA Science
2005年1月12日 · What was Deep Impact (EPOXI)? The primary mission of NASA’s Deep Impact was to probe beneath the surface of a comet. The spacecraft delivered a special impactor into the path of Tempel 1 to reveal never-before-seen materials and provide clues about the internal composition and structure of a comet. Nation United States of America (USA) […]
ESA/NASA’s SOHO Spies Bright Comet Making Debut in Evening Sky
2024年10月11日 · The ESA (European Space Agency) and NASA Solar and Heliospheric Observatory (SOHO) has captured images of the second-brightest comet to ever pass through its field of view during the spacecraft’s nearly 29-year career.
Solar System Exploration - NASA Science
Solar System Overview. Our solar system has one star, eight planets, five officially named dwarf planets, hundreds of moons, thousands of comets, and more than a million asteroids. Get Solar System Facts. Featured Story.
Comets Multimedia - Science@NASA
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