- Comet - Wikipedia
A comet is an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing This produces an extended, gravitationally unbound atmosphere or coma surrounding the nucleus, and sometimes a tail of gas and dust gas blown out from the coma
- Comets - Science@NASA
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 miles
- Comet | Definition, Composition, Facts | Britannica
When a comet comes close to the Sun, the ices sublimate (go directly from the solid to the gas phase) and form, along with entrained dust particles, a bright outflowing atmosphere around the comet nucleus known as a coma
- What Is a Comet? | NASA Space Place – NASA Science for Kids
What are the parts of a comet? At the heart of every comet is a solid, frozen core called the nucleus This ball of dust and ice is usually less than 10 miles (16 kilometers) across – about the size of a small town
- Record-Sized Comet Seen Belching Jets From Surface as It . . . - ScienceAlert
An absolutely gigantic comet is currently barreling into the inner Solar System at full steam And we mean that almost literally – astronomers have now detected big outbursts of carbon monoxide belching from its surface Comet C 2014 UN271 (Bernardinelli-Bernstein) is the largest Oort Cloud comet
- Comet: Definition, Tails, Facts, Orbit, Visibility, Difference
Comet appearance varies from a bright fuzzy ball with a tail to a faint diffuse patch in the sky Distinctive comas and tails stretching millions of kilometers characterize many visible comets Comet visibility periods range from weeks to months depending on their orbits and activity levels
- What Are Comets | What Does a Comet Look Like - Star Walk
When a comet is in the inner Solar System, the Sun warms it up, causing the comet's ice to vaporize and release dust and gas particles The solar wind blows those particles off the comet, and we see the dust and ion tails
- The 5000th Comet Discovered Using Space-Based Sun Observatory - MSN
The ESA NASA Solar and Heliospheric Observatory (SOHO) has officially discovered 5000 comets Comet number 5000 was spotted in SOHO images Credit: NASA's Goddard Space Flight Center Producer
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