Sep 25, 2025 · A nebula is a giant cloud of dust and gas in space. Some nebulae (more than one nebula) come from the gas and dust thrown out by the explosion of a dying star, such as a …

Aug 29, 2022 · This cloud was part of a bigger cloud called a nebula. At some point, the cloud collapsed—possibly because the shockwave of a nearby exploding star caused it to compress.

Nebula Name That Nebula play What Is a Nebula? How Did the Solar System Form? The story starts about 4.6 billion years ago, with a cloud of stellar dust. explore Gallery of NASA …

Sep 25, 2025 · A nebula is a cloud of dust and gas in space.

Sep 25, 2025 · Usually a very dense core is left behind, along with an expanding cloud of hot gas called a nebula. A supernova of a star more than about 10 times the size of our sun may leave …

Sep 25, 2025 · 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 …

Jun 27, 2019 · Watch this to learn more. Scientists spent a lot of time arguing over what a planet actually is. In 2006, they came up with a definition. They said a planet must do three things. …

Sep 25, 2025 · What's This Big Bang All About? In 1927, an astronomer named Georges Lemaître had a big idea. He said that a very long time ago, the universe started as just a …

Oct 11, 2024 · Test your nebulae knowledge and match these tumultuous clouds of gas and dust with their true names. These nebula views were taken by the Hubble Space Telescope, which …

Sep 25, 2025 · NASA science games, articles and activities for kids