Galaxies (what are they, what are they made of, shapes)
life cycles---Stars are born in nebulae. Huge clouds of dust and gas collapse under gravitational forces, forming protostars. These young stars undergo further collapse, forming main sequence stars.
what powers stars---The gas in our sun (hydrogen and helium nuclei) and in other stars is hot enough to produce collisions where fusion can take place.
explain fusion---the process or result of joining two or more things together to form a single entity.
constellations (explained)---In modern astronomy, a constellation is an internationally defined area of the celestial sphere.
super novas/novas---A nova (plural novae or novas) is a cataclysmic nuclear explosion in a white dwarf star. It is caused by the accretion of hydrogen on to the surface of the star/A supernova (abbreviated SN, plural SNe after "supernovae") is a stellar explosion that is more energetic than a nova.
Black holes---A black hole is a region of spacetime from which gravity prevents anything, including light, from escaping
explain fusion---the process or result of joining two or more things together to form a single entity.
constellations (explained)---In modern astronomy, a constellation is an internationally defined area of the celestial sphere.
super novas/novas---A nova (plural novae or novas) is a cataclysmic nuclear explosion in a white dwarf star. It is caused by the accretion of hydrogen on to the surface of the star/A supernova (abbreviated SN, plural SNe after "supernovae") is a stellar explosion that is more energetic than a nova.
Black holes---A black hole is a region of spacetime from which gravity prevents anything, including light, from escaping