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nebulae

n.
pl. 星云

星云

The Collaborative International Dictionary of English v.0.48 (gcide)

Nebula \Neb"u*la\ (n[e^]b"[-u]*l[.a]), n.; pl. {Nebulae}
(n[e^]b"[-u]*l[=e]). [L., mist, cloud; akin to Gr. nefe`lh,
ne`fos, cloud, mist, G. nebel mist, OHG. nebul, D. nevel,
Skr. nabhas cloud, mist. Cf. {Nebule}.]
1. (Astron.) A faint, cloudlike, self-luminous mass of matter
situated beyond the solar system among the stars. The term
was originally applied to any diffuse luminous region.
Now, technically, it is applied to interstellar clouds of
dust and gases ({diffuse nebula}). However distant
galaxies and very distant star clusters often appear like
them in the telescope, such as the {spiral nebula} in
Andromeda, known now to be a distant galaxy.
[1913 Webster PJC]

2. (Med.)
(a) A white spot or a slight opacity of the cornea.
(b) A cloudy appearance in the urine. [Obs.]
[1913 Webster]

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What Is a Nebula? | NASA Space Place – NASA Science for Kids
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 dust and gas As these clumps get bigger and bigger, their gravity gets stronger and stronger
Name That Nebula | NASA Space Place – NASA Science for Kids
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 is a telescope about the size of a school bus that orbits around Earth!
Nebula | NASA Space Place – NASA Science for Kids
Galaxies, nebulae, and supernova remnants to view or print explore; Glossary Find definitions of space and Earth science terms explore; How Scary Is Space? Check out these nine unearthly nightmares that could be happening right now in our own galaxy Eek! explore; Printed Product Downloads
What Is a Nebula? | NASA Space Place – NASA Science for Kids
A nebula is a cloud of dust and gas in space Una nebulosa es una nube gigante de polvo y gas en el espacio Algunas nebulosas provienen del gas y el polvo expulsado por la explosión de una estrella moribunda, como una supernova Otras nebulosas son regiones donde comienzan a formarse nuevas estrellas
Gallery of NASA Universe Images - NASA Space Place
Galaxies, nebulae, and supernova remnants to view or print Earth Sun Solar System Universe Science and Tech Educators Gallery of NASA Universe Images The NGC 2336 galaxy, pictured here, is approximately 100 million light-years away from Earth This image of the galaxy was captured by the NASA ESA Hubble Space Telescope
The Amazing Hubble Telescope - NASA Space Place
The Hubble Space Telescope was launched into orbit by space shuttle Discovery on April 24, 1990 Hubble orbits about 332 miles above Earth It is the length of a large school bus and weighs as much as two adult elephants Hubble travels about 5 miles per second
Universe | NASA Space Place – NASA Science for Kids
Galaxies, nebulae, and supernova remnants to view or print explore; What Is the Big Bang? Why do we call it that? explore; What Is Dark Matter? and dark energy, too! explore; Glossary Find definitions of space and Earth science terms explore; What Is a Nebula? A nebula is a cloud of dust and gas in space
What Is Dark Matter? | NASA Space Place – NASA Science for Kids
Dark matter is stuff in space that has gravity, but it is invisible and isn’t like anything else we know about Dark matter makes up about 27% of the universe
Hubble | NASA Space Place – NASA Science for Kids
Galaxies, nebulae, and supernova remnants to view or print explore; How Old Are Galaxies? Most galaxies formed more than 10 billion years ago! Learn about how we find the age of galaxies using light What Are Constellations? Learn more about what these groups of stars can (and can’t) tell us about our place in the universe explore; What Is
Gallery | NASA Space Place – NASA Science for Kids
Galaxies, nebulae, and supernova remnants to view or print explore; Gallery of NASA Solar System Images Glorious planets and moons to view or print explore; Gallery of NASA Earth Images View large images or print them explore

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