Physics & Astronomy
planetary systems
100%
solar system
84%
meteoroids
71%
bombardment
50%
exobiology
43%
Oort cloud
42%
Earth crust
41%
asteroid belts
39%
solar nebula
38%
Kuiper belt
38%
protoplanets
35%
star clusters
31%
coagulation
30%
sun
23%
time measurement
21%
orbits
19%
life (durability)
18%
energy
15%
estimates
15%
simulation
10%
Earth & Environmental Sciences
solar system
85%
timescale
58%
planetesimal
37%
material
33%
earth's crust
29%
asteroid
28%
energy
26%
coagulation
25%
simulation
11%
parameter
9%
Medicine & Life Sciences
Solar System
89%
Meteoroids
76%
Exobiology
37%
Minor Planets
33%
Parturition
28%
Energy Transfer
26%
Orbit
22%
Theoretical Models
16%
Agriculture & Biology
orbits
52%
energy
48%
coagulation
43%