The relationship between a star's planets and its temperature
The relationship between a star's temperature and it's luminosity
The elemental spectrum, to determine if certain elements are present on a star's surface.
The distance between stars in a local group based on their luminosity and color.
A black hole collapsing
Typically a red supergiant going into supernova ( if it's really big!)
A planetary nebula
Typically a red supergiant going into supernova (if it's a bit on the smaller side!)
...is not as small as a galactic black hole.
Is the result of a white dwarf collapsing at the end of its life
Is the result of a red supergiant collapsing at the end of its life (if it's big enough!)
Is the result of the end of a neutron star's life
Isn't the result of a supernova
Is the result of a red supergiant collapsing at the end of its life (if it's on the smaller side).
A yellow supergiant
A brown dwarf
The only one to have a planetary system
Hotter than most (hotter than sirius)
Elliptical ones are the most common
Spiral galaxies are the least common
Irregular galaxies are the least common
Black holes are in the center of all irregular galaxies
The universe is still shrinking
The stars bulge until they supernova creating black holes.
The distance between stars and other masses is growing, suggesting that we are still expanding from the initial explosion.
The Hubble telescope has taken pictures of the detonation zone, which happened 14 billion years ago, so we can see it as it was because of how far away it is.
Microwave radiation is still left over from the initial explosion in pockets of space where temperatures are still 3 degrees K. higher.
The objects or masses viewed are traveling away from us.
An object has mercury in it
The wavelengths are getting shorter
The mass or object viewed is coming closer, due to wavelengths getting longer.
Peter pan loves us all...
Billions of years of supernovae and other large explosions such as the hypothesized big bang, have shot elements created in their atmospheres through fusion, out into space.
We aren't made of star dust, but instead iron composite materials found in the center of the earth.