User uhoh

5

votes

1

answer

593

views

+100

Colloidal or electrospray thrusters - any advantages over ion thrusters?

ion-thruster

Apr 22 at 4:20 uhoh 125k

2

votes

1

answer

124

views

+100

Did New Horizons look for “sailboats” in the Pluto-Charon system's sailboat region? Did it pass through it or avoid it?

Apr 25 at 23:47 uhoh 125k

3

votes

1

answer

109

views

+100

Why did Luna 16 go to the Moon at night? (Extreme cold vs robotic sampling & launch back to Earth)

mission-design soviet-union sample-return luna luna-16

Apr 20 at 9:36 A. Rumlin 6,320

0

votes

2

answers

217

views

+100

Has an astronaut ever gone into a docked capsule to take a photo out one of its windows?

iss photography astronaut-lifestyle soviet-union spacecraft-window

Apr 13 at 17:11 Star Man 5,574

1

vote

1

answer

109

views

+100

Did anybody on the ISS photograph this partial eclipse? How long did it last? How did they safely photograph it?

iss photography astronaut-lifestyle

Apr 13 at 0:50 uhoh 125k

2

votes

1

answer

181

views

+100

What was the first satellite with mostly COTS electronics?

history record electronics cots smallsat

Apr 17 at 7:00 C0D3X 1,469

1

vote

0

answers

36

views

+100

Did Chang'e-3 and/or Yutu report getting hit by the Earth's magnetotail?

the-moon planetary-science measurement chang-e yutu

Apr 1 at 21:46 uhoh 125k

3

votes

0

answers

65

views

+100

Will you be having rubber or wax with your peroxide? (hybrid engine fuel tradeoffs)

fuel engine-design launch-vehicle solid-fuel hybrid-rocket

Mar 25 at 5:19 uhoh 125k

1

3

votes

0

answers

81

views

+100

Future trends in Earth Observation and Communications from VLEO; are there any?

artificial-satellite spacecraft low-earth-orbit very-low-earth-orbit

Mar 23 at 0:17 uhoh 125k

1

vote

1

answer

82

views

+100

Which fuel cell fuels have been demonstrated in space?

fuel power fuel-cell

Mar 23 at 15:07 DrSheldon 40.8k

4

votes

1

answer

208

views

+100

What does a 6-month GTO to GEO transfer look like in practice?

orbital-mechanics geostationary ion-thruster

Mar 23 at 0:56 uhoh 125k

4

votes

1

answer

167

views

+100

How do they measure the voltage of the Moon?

the-moon planetary-science electronics measurement lunar-prospector

Mar 21 at 22:53 uhoh 125k

9

votes

1

answer

244

views

+100

What are those plastic hoses on Perseverance used for?

mars probe rovers perseverance jpl

Mar 19 at 15:22 Saturn 5 71

4

votes

1

answer

224

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+200

What is this perturbation effect called, and what would be an analytical expression for the resulting eccentricity oscillations?

orbital-mechanics identify-this-object mathematics calculation

Mar 16 at 4:00 ChrisR 4,786

2

votes

2

answers

81

views

+100

How to convert to GEO cordinate from the Mars Solar orbital coordinate (Sun-state)

planetary-science coordinates maven

Mar 15 at 4:19 Martian 141

2

votes

1

answer

132

views

+100

“Are we there yet?” (45th Space Wing's goal of being able to support 48 launches per year from Cape Canaveral)

launch nasa military cape-canaveral

Mar 3 at 23:54 uhoh 125k

9

votes

1

answer

226

views

+100

What makes Insight's RAD750 processor so radiation resistant? (compared to 1998 iMac's PowerPC 750)

radiation insight electronics manufacturing computer

Mar 11 at 6:04 DrSheldon 40.8k

1

2

votes

2

answers

161

views

+100

How many independent demonstrations of optical communications between ground and space have been successful?

history communication record optical-communication

Apr 21 at 23:41 uhoh 125k

3

votes

1

answer

82

views

+100

Did specific changes to DSCOVR's mission or design produce the change from “may not represent the best expenditure ” to “strong and vital”?

cost policy government united-states dscovr

Mar 1 at 13:51 honeste_vivere 938

1

vote

0

answers

74

views

+100

Has Same Beam Interference (SBI) been used or at least tested at Mars? Are there plans to use it in the next few years?

mars tracking deep-space-network delay-doppler

Feb 18 at 6:07 uhoh 125k

3

votes

2

answers

367

views

+100

What liquids last the longest in space?

physics liquid-fuel astrodynamics stability

Apr 17 at 9:34 H. H. 261

1

2

votes

1

answer

142

views

+100

Does apsidal precession rate have any dependence on the argument of periapsis? Perhaps higher order?

orbital-mechanics mathematics

Feb 11 at 18:55 Ryan C 2,383

1

7

votes

1

answer

381

views

+200

What might the first deep space telescope using the Sun or Jupiter as a gravitational lens be like?

space-telescope

Feb 2 at 1:05 uhoh 125k

2

votes

1

answer

120

views

+200

Would the >100 km “knee” in Earth's atmosphere still be where MFP exceeded scale height if it were pure Ne or Ar?

atmosphere planetary-science karman-line turbosphere

Feb 6 at 2:01 uhoh 125k

0

votes

1

answer

175

views

+100

Highest number of distinctly different satellite designs on a single rocket

launch payload record

Feb 3 at 16:52 Dragongeek 13.6k

2

votes

1

answer

120

views

+100

Would the >100 km “knee” in Earth's atmosphere still be where MFP exceeded scale height if it were pure Ne or Ar?

atmosphere planetary-science karman-line turbosphere

Feb 6 at 2:01 uhoh 125k

1

7

votes

1

answer

381

views

+100

What might the first deep space telescope using the Sun or Jupiter as a gravitational lens be like?

space-telescope

Feb 2 at 1:05 uhoh 125k

2

11

votes

2

answers

546

views

+200

How are the Voyagers' thrusters configured in a novel way to minimize accelerations along Earth-spacecraft axis?

engines attitude voyager adcs doppler-ranging

Jan 29 at 3:57 Organic Marble 137k

3

11

votes

3

answers

1k

views

+100

A spacecraft leaves Earth exactly with escape velocity V2 - what trajectory it will have in Solar System?

orbital-mechanics

Jan 17 at 7:34 uhoh 125k

1

4

votes

0

answers

103

views

+100

Plotting satellite ground track with calculated latitude and longitude at a given moment

orbital-elements ground-track

Jan 16 at 10:49 uhoh 125k

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Colloidal or electrospray thrusters - any advantages over ion thrusters?

Did New Horizons look for “sailboats” in the Pluto-Charon system's sailboat region? Did it pass through it or avoid it?

Why did Luna 16 go to the Moon at night? (Extreme cold vs robotic sampling & launch back to Earth)

Has an astronaut ever gone into a docked capsule to take a photo out one of its windows?

Did anybody on the ISS photograph this partial eclipse? How long did it last? How did they safely photograph it?

What was the first satellite with mostly COTS electronics?

Did Chang'e-3 and/or Yutu report getting hit by the Earth's magnetotail?

Will you be having rubber or wax with your peroxide? (hybrid engine fuel tradeoffs)

Future trends in Earth Observation and Communications from VLEO; are there any?

Which fuel cell fuels have been demonstrated in space?

What does a 6-month GTO to GEO transfer look like in practice?

How do they measure the voltage of the Moon?

What are those plastic hoses on Perseverance used for?

What is this perturbation effect called, and what would be an analytical expression for the resulting eccentricity oscillations?

How to convert to GEO cordinate from the Mars Solar orbital coordinate (Sun-state)

“Are we there yet?” (45th Space Wing's goal of being able to support 48 launches per year from Cape Canaveral)

What makes Insight's RAD750 processor so radiation resistant? (compared to 1998 iMac's PowerPC 750)

How many independent demonstrations of optical communications between ground and space have been successful?

Did specific changes to DSCOVR's mission or design produce the change from “may not represent the best expenditure ” to “strong and vital”?

Has Same Beam Interference (SBI) been used or at least tested at Mars? Are there plans to use it in the next few years?

What liquids last the longest in space?

Does apsidal precession rate have any dependence on the argument of periapsis? Perhaps higher order?

What might the first deep space telescope using the Sun or Jupiter as a gravitational lens be like?

Would the >100 km “knee” in Earth's atmosphere still be where MFP exceeded scale height if it were pure Ne or Ar?

Highest number of distinctly different satellite designs on a single rocket

Would the >100 km “knee” in Earth's atmosphere still be where MFP exceeded scale height if it were pure Ne or Ar?

What might the first deep space telescope using the Sun or Jupiter as a gravitational lens be like?

How are the Voyagers' thrusters configured in a novel way to minimize accelerations along Earth-spacecraft axis?

A spacecraft leaves Earth exactly with escape velocity V2 - what trajectory it will have in Solar System?

Plotting satellite ground track with calculated latitude and longitude at a given moment