Caldwell 6 - NASA Science
Each of the eleven or more concentric rings, or shells, around the Cat's Eye is actually the edge of a spherical bubble seen projected onto the sky — material ejected in regular episodes 1,500 years apart and forming a layered, onion-skin structure around the dying star.
Stars and Nebulas - HubbleSite
2024年10月28日 · The Helix Nebula looks like a giant eye staring at us through space. The Red Rectangle — one of the weirdest planetary nebulas of all — appears exactly as sounds. The Helix Nebula is a layered and complex cloud of gas expelled and illuminated by …
Planetary Nebulas - Harvard–Smithsonian Center for Astrophysics
Our Sun may also make a planetary nebula when it runs out of nuclear fuel in about 5 billion years. The beauty of planetary nebulas is short-lived: they only linger a few thousand or tens of thousands of years before dispersing into interstellar space.
Planetary nebula - Wikipedia
As early as January 1779, the French astronomer Antoine Darquier de Pellepoix described in his observations of the Ring Nebula, "a very dull nebula, but perfectly outlined; as large as Jupiter and looks like a fading planet".
Nebula: Definition, Facts, Examples, Types, Difference
2024年9月9日 · Famous emission nebulae include the Orion Nebula, Carina Nebula, and Eagle Nebula. The Orion Nebula is located 1,300 light-years from Earth in the constellation Orion. Nicolas-Claude Fabri de Peiresc discovered the first emission nebula, the Orion Nebula, in 1610.
What is a Nebula? Nebula: Definition, Location and Variants | Space
2024年6月17日 · The principal force at work here is gravity, which causes the tenuous interstellar medium to condense into a nebula, and gravity that causes clumps inside the nebula to collapse down into stars.
Decoding Nebulae - NASA Science
2021年8月23日 · These tendrils of cosmic dust and gas sit at the heart of M16, or the Eagle Nebula. The aptly named Pillars of Creation, featured in these stunning Hubble images, are part of an active star-forming region within the nebula and hide newborn stars in their wispy columns.
Messier 27 (The Dumbbell Nebula) - Science@NASA
An aging star's last hurrah is creating a flurry of glowing knots of gas that appear to be streaking through space in this close-up image of the Dumbbell Nebula, also known as Messier 27 (M27), taken with NASA/ESA Hubble Space Telescope.
Track down the 25 best planetary nebulae in the night sky
2021年6月29日 · The Medusa Nebula evokes the hideous snakes of its mythological namesake with filaments of gas lit by the same object from whence they came — a dying star puffing away its outer layers.
Astronomy & Astrophysics 101: Planetary Nebula - SciTechDaily
2022年10月14日 · What Is a Planetary Nebula? A planetary nebula is a region of cosmic gas and dust formed from the cast-off outer layers of a dying star. Despite their name, planetary nebulae actually have nothing to do with planets. Intermediate-mass stars have a mass between 80% and 800% of the Sun’s mass.