111
gravity
× 20 |
44
life
× 8 |
22
cosmology
× 8 |
17
9th-planet
× 2 |
109
universe
× 22 |
44
mars
× 7 |
22
big-bang-theory
× 7 |
16
cosmological-inflation
× 6 |
93
star
× 20 |
39
orbit
× 12 |
21
asteroids
× 6 |
16
meteor
× 2 |
80
planet
× 16 |
39
observational-astronomy
× 6 |
21
dark-matter
× 5 |
16
nucleosynthesis
|
75
the-moon
× 12 |
31
exoplanet
× 6 |
20
general-relativity
× 7 |
15
space
× 6 |
69
earth
× 8 |
27
distances
× 7 |
20
redshift
× 7 |
15
matter
× 4 |
63
solar-system
× 11 |
27
atmosphere
× 4 |
20
size
× 3 |
14
mercury
× 4 |
62
light
× 10 |
27
planetary-ring
× 2 |
19
expansion
× 7 |
14
hawking-radiation
× 4 |
59
space-time
× 10 |
25
jupiter
× 3 |
19
amateur-observing
× 6 |
14
mass
× 4 |
58
black-hole
× 14 |
24
tidal-forces
× 4 |
18
milky-way
× 6 |
14
rotation
× 3 |
52
the-sun
× 9 |
24
saturn
|
18
meteorite
× 4 |
13
astrophysics
× 6 |
45
formation
× 5 |
24
natural-satellites
|
18
impact
× 3 |
13
artificial-satellite
× 2 |
44
galaxy
× 11 |
23
supernova
× 5 |
18
earth-like-planet
× 3 |
12
temperature
× 3 |