Planetary nebula: The Helix Nebula This is composed of expanding gas that was blown off by a star as it collapsed to a white dwarf. (Image credit: NASA, ESA, J. Hester, A. Loll (ASU)) Supernova remnant: The Crab Nebula Exactly as the name says, this is all that remains of a ...
Emission Nebulae are those that emit radiation from ionized gas and are often called HII regions because they are largely composed of ionized hydrogen. The Orion Nebula is an emission nebula and star-forming region. Not only is it thebrightest nebulain our sky, but it is also the most active...
Eris' atmosphere is too thin to be considered a true atmosphere and appears primarily to be composed of methane that sublimates from ice on the... Learn more about this topic: Dwarf Planets in the Solar System | Overview & Composition ...
A “medium composed of highly interactive computer simulations that sense the user’s position and replace or augment the feedback of one or more senses – giving the feeling of being immersed, or being present in the simulation” (Sherman & Craig, 1995 AU15: The in-text citation "She...
What constellation is Venus in? What are the stars in constellation Phoenix? How did the constellation Pegasus get its name? What constellation is the Orion nebula in? What is the Andromeda constellation? What constellation is Cassiopeia a part of?
Left of the belt stars is reddish Betelgeuse, with Rigel on its right. Above the belt stars is Bellatrix, and below is Saiph. Find those, and you'll also notice a fuzzy glowing object between the belt star, Saiph and Rigel. That's the Orion Nebula, also called M42, where stars are ...
A nebula is a truly wondrous thing to behold. Named after the Latin word for “cloud”, nebulae are not only massive clouds of dust, hydrogen and helium gas, and plasma; they are also often “stellar nurseries” – i.e. the place where stars are born. And for centuries, distant galaxi...
Composed of empty space, vacuum energy is believed to be a key driver of accelerated expansion in the universe. Since vacuum energy density is so similar in nature, it's often interchangeably called dark energy. Another theory, which has been partially disproven, defines dark energy as a new ...
Earthshine gets easier to see as the Moon moves further from the Sun and the crescent fills out a bit. Our planet provides enough light to spot some of the larger craters. Credit: Bob King While the crescent is illuminated by direct sunlight, you’ll also see the full outline of the ...
Suddenly, Mila's corpse is dumped down the stairs to the basement, and the Jem'Hadar also throw down a stun grenade, easily subduing the trio. The Defiant is in the thick of the battle, charging into enemy lines. O'Brien suffers a shoulder wound from exploding bridge debris and, ...