Hottest Questions Today

3

votes

0

answers

14

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How well would a supersonic aircraft perform in the Martian atmosphere?

asked 2 hours ago Mattias 141

0

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0

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11

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Is JWST Halo orbit prograde or retrograde and why?

orbit james-webb-telescope three-body retrograde-orbit

asked 2 hours ago Woody 4,909

1

vote

1

answer

25

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Why can n2yo somehow interpret this TLE but Skyfield can't? Why does it return nans and zeros for position?

james-webb-telescope two-line-elements python skyfield

answered 2 hours ago Brandon Rhodes 866

8

votes

2

answers

704

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Why is this Planet Labs video wobbly?

artificial-satellite photography reconnaissance-satellite

answered 13 hours ago David Hammen 57.8k

3

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1

answer

90

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What 1960s era launch pad and vehicle is shown in this still from stock footage?

history identify-this-object launch-site

answered 8 hours ago Organic Marble 151k

6

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1

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353

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Why was it necessary to monitor the water quantity in the space shuttle?

space-shuttle water

modified 11 hours ago Organic Marble 151k

9

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2

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776

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When and why did three-axis stabilization become prominent in geostationary satellites?

artificial-satellite geostationary spaceflight-firsts spin-stabilisation

modified 6 hours ago BrendanLuke15 4,725

0

votes

0

answers

29

views

How to make an algorithm that finds time to a true anomaly at epoch?

orbital-mechanics orbit mathematics

asked 10 hours ago John 85

0

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0

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39

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James Webb Space Telescope Velocity Loss Formula or how fast will JWST be going on L+26

mathematics james-webb-telescope astrodynamics calculation

asked 12 hours ago mountainbikebc 1

17

votes

1

answer

1k

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Could fuel cells of the Space Shuttles have been restarted in the case of a total power failure?

space-shuttle fuel-cell

modified yesterday CommunityBot 1

18

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3

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3k

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If one Starship can transport 100 people to Mars, how many could it safely land near Mercury's north pole after one Hohmann-like transfer?

orbital-mechanics spacex-starship hohmann-transfer mercury

modified 10 hours ago Cornelis 6,566

4

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0

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80

views

New spin on laundry day: How will ISS cope with washing machine vibration and angular momentum?

iss crewed-spaceflight water

modified yesterday Fred 9,790

5

votes

1

answer

108

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Starting refueled in LEO, how much payload could a heat-protected Starship softly land on Mercury after a gravity assist from Venus?

orbital-mechanics spacex-starship gravity-assist aerobraking mercury

modified yesterday Cornelis 6,566

2

votes

2

answers

77

views

Does the James Webb Telescope have a Two Line Element set?

orbital-elements james-webb-telescope two-line-elements

modified 3 hours ago uhoh 144k

8

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2

answers

800

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How long would it have taken to launch an Apollo contingency flight?

the-moon apollo-program lander

modified yesterday Uwe 43.7k

6

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2

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644

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Are In-Flight Electrically Heated Steam Rockets Possible?

rockets engines design-alternative

answered 2 days ago Acccumulation 537

11

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1

answer

2k

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Why are the JWST A3 and A6 position sensors different from all the others?

james-webb-telescope sensors

modified 2 days ago Organic Marble 151k

2

votes

1

answer

60

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What was the first spacecraft intentionally moved from GEO to the graveyard orbit to die? (just a bit above geosynchronous)

history orbital-maneuver geostationary spaceflight-firsts geosynchronous

modified yesterday blobbymcblobby 2,909

27

votes

3

answers

11k

views

Is there any point in space that the James Webb Space Telescope would be unable to image?

james-webb-telescope

modified Jan 11 at 22:37 Gavin S. Yancey 516

3

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0

answers

53

views

How many hours/week on the ISS is spent on science vs maintenance?

iss crewed-spaceflight

asked yesterday supersonic 91

1

vote

0

answers

37

views

How to make diamagnetic lunar simulant that would "float" in a strong enough magnetic field? (for China's 60 cm high field simulator)

the-moon planetary-science china regolith simulator

modified yesterday uhoh 144k

10

votes

1

answer

351

views

Why do EVA suits have legs?

iss spacesuits eva

modified 2 days ago GdD 18.1k

10

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4

answers

741

views

Why are uncertainties of orbital state vectors provided as covariance matrixes?

astrodynamics

modified 2 days ago Rafa 680

20

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1

answer

3k

views

James Webb orbit insertion

orbital-mechanics orbital-maneuver james-webb-telescope

modified Jan 12 at 22:57 Peter Mortensen 301

3

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2

answers

406

views

Is JWST going to be in antumbra at L2?

james-webb-telescope solar-eclipse

modified Jan 14 at 20:37 saolof 161

1

vote

0

answers

19

views

What fraction of the Kapton thickness on the ISS' solar panels was likely eroded throughout their lifetime? Predictions? Measurements?

low-earth-orbit design materials oxygen solar-panel

modified yesterday uhoh 144k

2

votes

0

answers

41

views

Cost breakdown of launch companies

launch-vehicle cost operations

asked 2 days ago hopper19 191

23

votes

2

answers

6k

views

Why aren't spacecraft and spacesuits pressurised to 2.5 psi (17 kPa) of pure oxygen?

crewed-spaceflight spacesuits oxygen pressure

modified Jan 13 at 16:56 Woody 4,909

2

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0

answers

32

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Description of jwst data acquisition pipeline

james-webb-telescope data-pipeline

asked 2 days ago tckosvic 1,320

4

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2

answers

166

views

What is the largest possible rocky body? [closed]

gravity mass planet

answered 2 days ago Slarty 5,078

11

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2

answers

1k

views

What are the benefits of supersynchronous transfer orbits?

orbital-mechanics orbital-maneuver delta-v geosynchronous supersynchronous

modified Jan 11 at 22:01 BrendanLuke15 4,725

0

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0

answers

11

views

What was the first spacecraft intentionally placed in a supersynchrous Earth orbit? (period longer than a sidereal day)

history spaceflight-firsts geosynchronous

asked 2 days ago uhoh 144k

2

votes

2

answers

125

views

Curvature of the JWST mirrors

james-webb-telescope space-telescope

answered Jan 15 at 0:56 John McCarthy 172

14

votes

2

answers

3k

views

Did any Columbia debris continue orbiting Earth?

space-shuttle reentry debris shuttle-columbia

modified Jan 10 at 19:33 Machavity 5,611

1

vote

2

answers

110

views

Why “super” for supersynchronous orbits? Why not “trans”?

orbital-mechanics terminology supersynchronous

answered 2 days ago uhoh 144k

0

votes

0

answers

103

views

Pressurized gloves have significant limitations. What are objective advantages/disadvantages of the alternatives? [closed]

iss spacesuits eva tools

modified Jan 14 at 22:04 uhoh 144k

1

vote

1

answer

84

views

What are all these packages attached to a side module of the ISS? How did they all get there?

iss identify-this-object earth-observation

modified Jan 13 at 22:18 Organic Marble 151k

11

votes

3

answers

2k

views

Docking in space

apollo-program docking mechanisms

answered Jan 10 at 15:05 Innovine 4,356

13

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3

answers

975

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A way to overcome fuel limits on JWST and its operational lifetime; "clip-on" propulsion systems in development that might work in the future?

nasa spacecraft design-alternative james-webb-telescope

modified yesterday blobbymcblobby 2,909

1

vote

0

answers

48

views

Fuel profile for Apollo 11

the-moon apollo-program fuel landing

modified Jan 14 at 13:55 Brian Tompsett - 汤莱恩 6,053

3

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0

answers

82

views

ISS propagation becomes much more accurate with reduced drag. Any ideas why?

low-earth-orbit atmospheric-drag astrodynamics

asked Jan 14 at 5:37 Rafa 680

7

votes

1

answer

158

views

Can the JWST deployment steps be reverted?

james-webb-telescope

answered Jan 15 at 1:25 John McCarthy 172

3

votes

1

answer

70

views

Has a cubesat ever caused a problem for another spacecraft? Examples? Close calls?

cubesat collision-avoidance mission-anomaly conjunction

modified Jan 14 at 0:40 blobbymcblobby 2,909

40

votes

6

answers

6k

views

If we can get people to the moon and back, why are we so adamant that it's impossible to service James Webb at 4x that with a one way robotic vehicle?

james-webb-telescope service-utilities

modified Dec 29 '21 at 13:40 PearsonArtPhoto♦ 116k

14

votes

2

answers

1k

views

Would a sufficiently deep cavern on Mars provide habitable temperature and atmospheric pressure? Was Dick Tracy wrong?

mars atmosphere mining habitat isru

modified Jan 12 at 12:14 Cornelis 6,566

12

votes

1

answer

1k

views

Why did a solar eclipse of the sun as seen from Apollo 11 appear to have an elliptical corona?

the-moon apollo-program apollo-11 solar-eclipse

modified Jan 13 at 17:26 BrendanLuke15 4,725

6

votes

1

answer

226

views

When is the supersynchronous orbit more efficient than a typical Hohmann transfer where inclination change and circularization are simultaneous?

orbital-mechanics delta-v geostationary hohmann-transfer supersynchronous

modified Jan 11 at 21:57 BrendanLuke15 4,725

1

vote

0

answers

26

views

GMAT B-Plane to Mars different date

mars gmat

asked Jan 14 at 15:52 marco 11

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