Hottest Questions Today

2 votes

1 answer

35 views

Could ingenuity survive if Perservance failed?

Jörg W Mittag

12.7k

answered 6 hours ago

0 votes

1 answer

76 views

Why aren't clusters of F-15 or SR-71 engines used for a boost stage for rockets? [duplicate]

launch rockets design-alternative booster-flyback

BrendanLuke15

8,216

modified 5 hours ago

5 votes

3 answers

525 views

What is "aerospace grade"?

rockets materials construction

BradV

1,897

answered 14 hours ago

19 votes

4 answers

3k views

What makes aluminum aerospace grade?

rockets materials construction

Jörg W Mittag

12.7k

answered yesterday

1 vote

1 answer

52 views

Historical Moon’s True Anomaly Numbers

the-moon

JohnHoltz

1,153

answered yesterday

10 votes

6 answers

4k views

How could 99942 Apophis, in 2029, be captured and brought into a low Earth orbit?

orbital-mechanics asteroid delta-v near-earth-asteroid

TLW

298

modified yesterday

3 votes

1 answer

116 views

What if Perseverance had experienced a fault after dropping Ingenuity?

mars solar-power perseverance ingenuity

John Dallman

356

modified yesterday

0 votes

0 answers

52 views

Repeat ground track with 1 day repetition

low-earth-orbit ground-track

Fede

61

modified yesterday

12 votes

1 answer

997 views

Why was the Atlas V's SRB kept attached for 1 minute after burnout in the OFT-2 mission?

srb atlas-v cst-100 boeing

JRE

591

modified May 20 at 14:28

5 votes

1 answer

131 views

Is there any chance that Opportunity survived, but NASA kept pinging it at the wrong time?

mars curiosity opportunity

compi

637

modified yesterday

18 votes

5 answers

11k views

Why doesn’t NASA build its rockets using graphene?

rockets nasa design-alternative future-missions research

The Rocket fan

268

modified May 17 at 12:42

0 votes

1 answer

187 views

Why is my C++ code for an orbit propagator wrong?

orbital-mechanics orbit trajectory

user47149

588

modified 2 days ago

2 votes

0 answers

48 views

Reaction control system testing

launch rcs

nik

85

modified 2 days ago

2 votes

1 answer

94 views

How many times has SpaceX reused Falcon 9 first stage until now? [closed]

spacex rockets falcon-9 reuse first-stage

The Rocket fan

268

modified May 20 at 11:47

3 votes

0 answers

89 views

How does US crewed launch abort coverage "jump" the ocean in an instant?

launch crewed-spaceflight dragon-v2 abort cst-100

BrendanLuke15

8,216

modified May 20 at 16:55

5 votes

2 answers

1k views

Are nozzle plugs taken out before launch or are they ejected upon ignition?

launch engines nozzle

Organic Marble

157k

modified May 16 at 17:24

2 votes

1 answer

103 views

How to plot a satellite's orbit around Earth in MATLAB?

orbital-mechanics physics astrodynamics

pathfinder_EOS

441

modified May 20 at 13:41

1 vote

0 answers

91 views

After one year exploring Jezero's crater floor, (why) hasn't there been any investigation into the presence of trace elements with PIXL?

mars perseverance astrobiology geology instrument

Cornelis

7,050

modified 19 hours ago

6 votes

3 answers

115 views

Is crater counting accurate for relative dating between celestial bodies?

mars the-moon planetary-science crater

BrendanLuke15

8,216

modified May 19 at 20:55

0 votes

0 answers

24 views

Between two spacecraft, differential phase measurements are used to achieve high relative bearing accuracy. How is this done?

Geebee

1

asked May 20 at 14:05

0 votes

1 answer

55 views

How to calculate the max mass and speed of an asteroid capturable by gravity assist?

asteroid gravity-assist capture

notovny

4,351

answered May 19 at 10:59

1 vote

0 answers

20 views

NASA GMAT Hardware in the Loop testing

nasa mission-design testing gmat simulator

ITried

111

asked May 20 at 15:13

29 votes

6 answers

9k views

Has any space agency saved Earth from a major calamity any time?

nasa isro esa planetary-defense

user47149

588

modified Apr 26 at 20:03

9 votes

4 answers

5k views

Can a military satellite be used to spy on any place on Earth undetected? [closed]

military reconnaissance-satellite

BradV

1,897

modified May 14 at 21:27

5 votes

1 answer

76 views

Low-thrust maneuver validation in GMAT

gmat low-thrust

djcinsb

76

modified May 20 at 5:27

7 votes

2 answers

308 views

Helium balloon as a rocket

design-alternative balloons monopropellant

The Rocket fan

268

modified May 17 at 12:07

7 votes

3 answers

251 views

Can something like SpinLaunch actually work?

launch heat-shield acceleration

BrendanLuke15

8,216

modified May 19 at 13:32

0 votes

0 answers

42 views

How do I convert from one local NED frame to another?

rockets reentry coordinates frames

Glorfindel

640

modified May 19 at 11:47

11 votes

1 answer

1k views

Does the Merlin vacuum engine on SpaceX's Falcon 9 gimbal?

spacex falcon-9 attitude-determination-and-control vacuum gimbaled-engines

Organic Marble

157k

answered May 11 at 20:32

0 votes

0 answers

37 views

Alodine on Spacecraft External Surfaces?

spacecraft design thermal-control outgassing

sc25

1

asked May 17 at 22:26

5 votes

1 answer

332 views

How to find the hyperbolic angle given the mean anomaly?

orbital-mechanics gravity-assist calculation

Chris

53

modified May 13 at 23:27

3 votes

1 answer

423 views

What's this inside the RD-0120?

engines injector rd-0120

fasterthanlight

2,185

modified May 13 at 13:03

5 votes

2 answers

286 views

Where can I find an up-to-date report on the Hubble Telescope's orbital history and current altitude?

hubble

BrendanLuke15

8,216

answered May 12 at 13:24

0 votes

2 answers

149 views

Can a human base jump to earth from a satellite? [duplicate]

artificial-satellite

bukwyrm

291

modified May 15 at 8:36

6 votes

1 answer

313 views

How far is the solar system's center of mass from the sun? [duplicate]

orbital-mechanics orbit the-sun center-of-gravity

BrendanLuke15

8,216

modified May 10 at 11:47

7 votes

1 answer

215 views

Is the Beagle fixable?

mars rovers perseverance

Deko Revinio

81

modified May 20 at 17:36

6 votes

1 answer

162 views

Can we use magnets to land a spaceship (Starship)?

spacex-starship design-alternative magnetic-field

Camille Goudeseune

10.3k

modified May 14 at 4:28

8 votes

1 answer

741 views

What is the purpose of the shrouds surrounding these rocket engines?

rockets engines engine-design liquid-fuel

user47149

588

modified May 7 at 17:14

14 votes

2 answers

2k views

Could a Mars rover go to Phobos or Deimos instead?

mars fuel rovers phobos deimos

Starship is go for launch

2,001

modified May 17 at 13:46

3 votes

0 answers

155 views

Why "quiet cruise" of a spacecraft would cost NASA 30 mln $ a year?

nasa interplanetary cost

Heopps

8,446

modified May 12 at 11:43

4 votes

1 answer

157 views

Do monopropellants have a characteristic length?

engine-design calculation monopropellant

ecfedele

493

answered May 14 at 23:14

0 votes

1 answer

200 views

Can we launch from the moon?

launch the-moon technology launchpad liftoff

Organic Marble

157k

modified May 9 at 12:23

5 votes

2 answers

1k views

Resources on Coking?

rockets engines kerosene

Woody

6,410

modified May 5 at 4:41

2 votes

0 answers

129 views

Is electric propulsion feasible for human spaceflight?

crewed-spaceflight orbital-elements ion-thruster future-missions electric-propulsion

user47149

588

modified May 17 at 20:35

4 votes

0 answers

45 views

Is there a significant reason why pintle injectors are only used in single configuration?

engine-design injector

ecfedele

493

asked May 13 at 12:59

2 votes

1 answer

71 views

How does one calculate the look angle for non-geo satellites (i.e. LEO, HEO, etc.)

orbital-mechanics artificial-satellite mathematics communication-satellite satellite-constellation

Ryan C

5,197

modified May 11 at 22:56

8 votes

5 answers

2k views

Do two objects with intersecting orbits have to collide given enough time?

orbital-mechanics

SafeFastExpressive

1,183

answered Apr 25 at 0:19

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