Physics & Astronomy
energy storage
61%
spacecraft
51%
high acceleration
40%
energy requirements
38%
scavenging
37%
supplying
35%
probes
33%
extrasolar planets
30%
encounters
29%
solar system
29%
planets
26%
isotopes
24%
communication
23%
trajectories
22%
stars
19%
molecules
15%
thin films
14%
performance
12%
lasers
12%
energy
8%
Engineering & Materials Science
Power and Energy
100%
Extrasolar planets
53%
Energy storage
49%
Isotopes
34%
Planets
32%
Solar system
32%
Stars
28%
Energy harvesting
28%
Molecules
27%
Thin films
26%
Spacecraft
25%
Lasers
21%
Trajectories
19%
Communication
14%
Earth & Environmental Sciences
energy storage
68%
spacecraft
52%
planet
50%
probe
45%
need
45%
environmental constraint
35%
solar system
29%
maturation
28%
energy
27%
trajectory
22%
communication
21%
laser
21%
isotope
21%