https://padlet.com/pvalen02/o31revih5l7yptk4 en-us 2024-09-17 20:09:04 UTC 2024-09-17 20:41:54 UTC hello@padlet.com pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124317691 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.

]]> 2024-09-17 20:30:39 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124317691 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124319175 They are formed from low-mass stars and come in a variety of shapes and sizes. When a low-mass star runs out of both hydrogen and helium fuel, it collapses and ejects the hot gas surrounding the core.

]]> 2024-09-17 20:32:08 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124319175 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124320252 They are a major source of heating of interstellar gas using the magnetic turbulence and violent shocks that they produce.

]]> 2024-09-17 20:33:23 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124320252 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124321486 Nebulae are always in motion.

]]> 2024-09-17 20:34:35 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124321486 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124322170 It is a very useful graph because it can be used to chart the life cycle of a star.

]]> 2024-09-17 20:35:23 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124322170 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124323330 Main sequence stars make up around 90% of the universe's stellar population. 

]]> 2024-09-17 20:36:28 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124323330 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124324172 Near the end of its nuclear burning stage, this type of star expels most of its outer material, creating a planetary nebula. Only the hot core of the star remains.

]]> 2024-09-17 20:37:13 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124324172 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124325281 Supergiants can contain 8 - 200 times the mass of the Sun! 

]]> 2024-09-17 20:38:13 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124325281 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124325975 Massive stars easily rank as the most luminous in the cosmos, the brightest outshine the Sun by a million times. 

]]> 2024-09-17 20:38:56 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124325975 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124326479 A nova reaches maximum luminosity within hours after its outburst and may shine intensely for several days or occasionally for a few weeks

]]> 2024-09-17 20:39:29 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124326479 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124327296 Supernovae are considered one of the original sources of the elements heavier than iron in the Universe. 

]]> 2024-09-17 20:40:19 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124327296 pvalen02 https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124328972 Black holes have helped us test Einstein's theory of general relativity, which describes how mass, space, and time are related to one another.

]]> 2024-09-17 20:41:54 UTC https://padlet.com/pvalen02/o31revih5l7yptk4/wish/3124328972