17
perseverance
|
14
analysis
|
6
physical-activity
|
2
earth
|
17
physics
|
13
engines
× 3 |
6
lander
|
2
water
|
17
thermal
|
9
apollo-program
|
6
lightning
|
1
voyager
|
17
thermal-control
|
9
battery
|
6
gravity
|
1
adcs
|
16
rockets
× 3 |
8
mars
× 2 |
6
crewed-spaceflight
|
1
attitude
|
15
microscope
× 2 |
7
qualification-testing
|
5
explosives
|
1
doppler-ranging
|
15
the-moon
× 2 |
7
record
|
5
specific-impulse
|
1
history
|
14
remote-sensing
|
7
testing
|
4
fins
|
1
iss
|
14
rosetta
|
6
rovers
|
4
design
|
1
meteoroid
|
14
microgravity
|
6
reduced-gravity-sports
|
4
aerodynamics
|
IronEagle
