doppler shifts
Galxies were once thought to be nebulaes
*the correct term is nebulae. a nebulae is a could of many gases and dust, where stars are created. TYPES: Diffuse Nebulae- the most common type. it is interstellar, which means among the stars, and not part of any galaxy. Planetary Nebulae- completely unrelated to planets. planetary nebulae is when gas and plasma are formed after certain types of stars die. it sometimes looks like gas planets, like neptune and uranus, hence the name. Reflection Nebulae- clouds of dust that reflect the light of nearby stars, though they are not nebulae, because they do not create stars. Protoplanetary Nebulae- a point in the lifetime of an astronomical object (star). protoplanetary nebulae, or preplanetary nebulae, emit light, much like reflection nebulae Emission Nebulae- a could of ionized gas which emits colorful lights
They get enegry by giant clouds of dust called nebulae.
A star is created once enough dust/gas gather up (called nebulae) and the gravity from a nearby star or shockwave from a nearby supernova causes it to contract. Once a star dies, it blows and becomes a nebulae again, recreating the entire process over and over again to repeat until the end of time. (unless the star becomes a black hole.)
emission nebulae and reflection nebulae.
emission nebulae and reflection nebulae.
A large cloud of gas and dust in space is called a nebula. These nebulae are often the birthplaces of stars and planets, with various types such as emission, reflection, and dark nebulae.
The different types of nebulae include emission nebulae, reflection nebulae, and dark nebulae. Emission nebulae are clouds of gas and dust that emit light, reflection nebulae reflect light from nearby stars, and dark nebulae are dense clouds of dust that block the light from behind them.
From vast clouds of dust and gas called nebulae.
anu way the answer is PERIOD OF ROTATION! hope i helped.
The main types of nebulae are emission nebulae, reflection nebulae, dark nebulae, and planetary nebulae. Emission nebulae glow with their own light, often due to hydrogen gas being ionized by nearby stars. Reflection nebulae reflect light from nearby stars. Dark nebulae are dense clouds of dust that obscure light. Planetary nebulae are the ejected outer layers of dying stars.
Planetary nebulae (the cat's eye nebula) Emission nebulae (the orion nebula) Dark nebulae (the horsehead nebula) Supernova remnant nebulae (the crab)