Linked Questions

14 votes
1 answer
3k views

What are these air-vent-like structures on this satellite?

I struck out with my previous question so I'll try again. What are these large circular 4-vane structures on the sides of NOAA-19 - the satellite that "fell down"? They remind me of ...
uhoh's user avatar
  • 149k
11 votes
1 answer
6k views

How have space suits dissipated the heat removed from astronauts?

I never thought about this until reading the comments below this answer. To radiate something like 150W (a very conservative lower limit of human + suit systems heat production - see @Uwe 's comment ...
uhoh's user avatar
  • 149k
8 votes
2 answers
2k views

What are these very large, square panels on Inmarsat 5?

Question: What are these very large square panels on Inmarsat 5's? They seem to each have an extremely reflective mirror-like flat/smooth tiled-appearing side, and a nearly black side with a lot of ...
uhoh's user avatar
  • 149k
3 votes
3 answers
863 views

What are the louver-like structures on the sides of the Mariner 4 probe?

The COSMOS Magazine article First mission to Mars: Mariner 4’s special place in history July 14, 1965, forever changed the way we see Mars. Tim Wallace looks back at one of NASA’s greatest triumphs ...
uhoh's user avatar
  • 149k
1 vote
2 answers
354 views

Why are deeper folds better for absorption?

The NASA News item NASA’s New Shape-Shifting Radiator Inspired by Origami describes a technique for spacecraft temperature regulation combining both a shape-changing surface and an emissivity-changing ...
uhoh's user avatar
  • 149k
8 votes
1 answer
556 views

What is the function of this array of what looks like mirrors on TESS?

The Mashable.com article TESS is about to become your new favorite NASA mission shows a beautiful photo of the TESS spacecraft in a state that looks like it is nearly ready to launch. There is a ...
uhoh's user avatar
  • 149k
2 votes
1 answer
1k views

ULA's plan for LH2/LOX 2nd stage that can maintain propellant for an extended period of time?

Business Insider's (long) article SpaceX's biggest rival has a 'genius' plan to cut its rocket launch costs more than 70% contains the statements sourced from ULA's CEO Tory Bruno: Vulcan should ...
uhoh's user avatar
  • 149k
2 votes
1 answer
701 views

Why were early satellites produced with polished "mirror-like" surfaces?

Many/most early artificial satellites were spheres with mirror-like polished outer surfaces. I am guessing that for lower orbits the spherical shape minimized drag as well as simplified the analysis ...
uhoh's user avatar
  • 149k
4 votes
1 answer
597 views

How do you find the temperature of an orbiting aluminum sheet 10x10 cm

I'm trying to find the temperature of a CubeSat in orbit at 140km. I'm trying to use the Stefan-Boltzmann law but don't know how to incorporate the energy from sunlight. I'm using this as a check for ...
mojojojo's user avatar
  • 141
1 vote
1 answer
459 views

Cooking in Space

Someone in the Worldbuilding SE asked How to Build a BBQ for the ISS. My first through was: Why not just stick it in a sealed container out in direct sunlight for a bit? It'll get plenty cooked ...
ShadoCat's user avatar
  • 910
8 votes
1 answer
334 views

Are black and white stripes any better than uniform gray for thermal control?

Q: What color is a spaceship? Several answers and comments on Why were Europe's first few satellites so stylish? Why the pronounced alternating white and black stripes? contain phrases like "...
uhoh's user avatar
  • 149k
3 votes
2 answers
228 views

Typical external temperature profile for a LEO satellite

I bumped into a question regarding LEO orbit. Is an external temperature profile available in literature as a first approximation for thermal analysis? I bumped into articles mentioning that the ...
Enrico's user avatar
  • 31
2 votes
0 answers
357 views

Maximum and minimum surface temperatures of a satellite in GEO?

Just as the title, how could one find out, or simply estimate the maximum and minimum likely surface temperatures of a satellite orbiting in GEO.
parry's user avatar
  • 21