Physics & Astronomy
plasma propulsion
100%
terrestrial planets
79%
thrust
66%
pulsed plasma thrusters
66%
propulsion
50%
maneuvers
39%
high thrust
23%
electric propulsion
21%
Hall thrusters
20%
requirements
20%
specific impulse
19%
flight
13%
spacecraft
13%
impulses
13%
field emission
13%
interferometers
11%
estimates
8%
configurations
7%
gases
7%
Engineering & Materials Science
Planets
69%
Pulsed plasma thrusters
63%
Plasmas
54%
Propulsion
53%
Hall thrusters
19%
Field emission
15%
Interferometers
14%
Electric propulsion
14%
Spacecraft
10%
Gases
6%
Earth & Environmental Sciences
planet
53%
thrust
51%
plasma
46%
interferometer
13%
spacecraft
10%
gas
6%