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Shocks from supernovae are the explosions of massive stars.
Supernovae release vast quantities of radiation. However, the impact on planets of nearby stars without life is probably long-term negligible... rocks aren't affected all that much by radiation anyway.
by the winds of massive stars and supernovae
Planets orbit stars.
A type of explosion that some believe started the Universe.
Shocks from supernovae are the explosions of massive stars.
Planets are pieces of material that orbit a star such as the earth orbits the sun. Stars are 'suns' and are distributed throughout the universe. Stars are much larger than planets hence the reason that at night stars can be seen in the sky and planets cant even though the stars are much futher away than the other planets in our solar system.
For the most part, we can't see individual stars in other galaxies (with one notable exception), so obviously detecting planets is out of the question. (The exception is supernovae, stars that are in the process of exploding.)
Massive Stars.
Both new planets and stars are being formed. Scientists are actually watching the formation of planets and keeping track of which ones would be able to support life.
Supernovae release vast quantities of radiation. However, the impact on planets of nearby stars without life is probably long-term negligible... rocks aren't affected all that much by radiation anyway.
by the winds of massive stars and supernovae
Very large ones.
Planets orbit stars.
A type of explosion that some believe started the Universe.
"explode as supernovae". These are called Type II supernovae and sometimes a neutron star is formed, not a black hole.
stars, the planets have to get heat from stars