Sep 25, 2025 · Nebulae are made of dust and gases—mostly hydrogen and helium. The dust and gases in a nebula are very spread out, but gravity can slowly begin to pull together clumps of …

Sep 25, 2025 · Comets are large objects made of dust and ice that orbit the Sun. Best known for their long, streaming tails, these ancient objects are leftovers from the formation of the solar …

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.

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 · 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 …

That glowing gas cloud is called a planetary nebula, and what is left behind at the center is called a white dwarf. The white dwarf may have half the mass of the Sun contained in an object with …

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

Sep 25, 2025 · Many stars, nebulae, and other objects are named after the constellations they are found in. For example, meteor showers are named for the constellation where the meteors …

Sep 25, 2025 · Most asteroids are made of different kinds of rocks, but some have clays or metals, such as nickel and iron. Mathilde, Gaspra, and Ida are three asteroids that have been …

Sep 25, 2025 · We live on a planet called Earth that is part of our solar system. But where is our solar system? It’s a small part of the Milky Way Galaxy. A galaxy is a huge collection of gas, …