2019年10月3日 · A typical diffuse nebula is a few hundred light-years across. (NGC 2264 shown; see also the Horsehead Nebula) Planetary Nebulae Planetary nebulae are shells of gas thrown out by …

2019年11月5日 · A nebula is a huge cloud of combined gas and dust in space. It can contain hydrogen, helium, and/or plasma. Click for even more facts or information.

Nebulas' size ranges from millions of miles to hundreds of light-years in diameter. Keep reading for more interesting facts perfect for kids.

2019年10月2日 · The dark nebula that forms the Horsehead itself is known as Barnard 33 (B 33). The red background is the emission nebula IC 434, the reflection nebula NGC 2023 and the emission …

2019年11月14日 · The Andromeda galaxy is the largest galaxy in the Local Group, more than twice the size of the Milky Way. Click for even more amazing facts and information.

2019年9月25日 · Here is a brief outline of the current theory of the events in the early history of the solar system: A cloud of interstellar gas and/or dust (the “solar nebula”) is disturbed and collapses under …

2019年12月6日 · R136a1 is the most massive and luminous star ever discovered in the Universe. It is also one of the hottest stars, and it is located in the Large Magellanic Cloud. Key Facts & Summary …

2020年7月14日 · This nebula can be found a third of a degree from the Horsehead Nebula. NGC 2023 is around 1,467 light-years away from Earth. Monkey Head Nebula The Monkey Head Nebula, …

2020年6月12日 · Maia, also designated as 20 Tauri, is a star located in the zodiacal constellation of Taurus, the celestial bull. Click for even more facts.

2020年8月17日 · Monoceros is a faint constellation located on the celestial equator. Its name translates to unicorn from Greek. Click for more information.