How is gamma ray blocked in the atmosphere in cosmic rays?
61126
How Earth protected from the gamma rays generated by Sun?
99275
Do x-rays and gamma rays also contain photons like visible light does?
35085
If both radio waves and gamma rays can travel through walls
53874
Why don't absorption and emission lines cancel out in our Sun?
7546
Why doesn't the solar wind disrupt the planets?
278
How can a neutron star radiate when it is neutral?
25560
Neutrinos arrived before the photons (supernova)
18257
How can interstellar space have a temperature of 2-3K?
50575
Collisions in space/vacuum
60730
Why is air not sucked off the Earth?
51304
Is it theoretically possible to shield gravitational fields or waves?
150813
Why does a photon colliding with an atomic nucleus cause pair production?
121231
How does gravity cause nuclear fusion in stars?
90766
Why are alpha particles such a prominent form of radiation and not other types of nucleon arrangement?
15029
How do we know that the nucleus isn't a quark-gluon plasma?
118334
How does the Sun provide enough energy to fuse protons?
120824
Black body radiation and spectra lines