These phenomena are due to the effects of solar radiation and the outstreaming solar wind plasma acting upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of …

1 day ago · From jaw-dropping astrophotography to close brushes with the sun and a savage break up. here's six events that made 2025 the year of the comet.

Nov 29, 2025 · Comet, a small body orbiting the Sun with a substantial fraction of its composition made up of volatile ices. Comets are among the most-spectacular objects in the sky, with their bright …

5 days ago · Comet 3I/ATLAS, the third interstellar object ever detected, will swing closest to Earth overnight from Thursday to Friday (Dec. 18 to 19). Here’s how to see it.

Dec 3, 2025 · 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 …

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what you’ll need to catch a glimpse.

5 days ago · Today is one astronomers, stargazers and alien conspiracy theorists have been waiting for: interstellar comet 3I/ATLAS is as close to Earth as ever.

Aug 26, 2025 · Simply put, a comet is a large body of ice and dust orbiting the Sun, sometimes seen as a bright object in the sky with a long tail streaming behind it. Wanderers of the Solar System, comets …

Apr 24, 2025 · Each comet has a frozen part, called a nucleus, often a few miles across. The nucleus contains icy chunks, frozen gases with bits of embedded dust. A comet warms up as it nears the Sun …

6 days ago · We're wrapping up today's T-2 day countdown to the comet 3I/ATLAS flyby of Earth, but we'll be back tomorrow with another series of stories and a look back at the comet's legacy.