Linked Questions

12 votes
2 answers
9k views

Temperature of a satellite orbiting in low Earth orbit

I am working on a project for science fair that involves a deployable component that will not be heated on a CubeSat. I am trying to find data for the skin temperature of a satellite (or the ISS) over ...
Matthew's user avatar
  • 223
11 votes
1 answer
5k 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
5 votes
3 answers
853 views

Why were Europe's first few satellites so stylish? Why the pronounced alternating white and black stripes?

In The Century of Space Science, edited by J.A. Bleeker, Johannes Geiss, M. Huber, viewed in Google books I ran across the following text and images. Both satellites are quite stylish looking and have ...
uhoh's user avatar
  • 149k
4 votes
3 answers
4k views

What is the daytime ambient temperature on the moon in shade?

I know that the daytime surface temperature can exceed 270°F (130°C) but if you measured the temperature 5 feet (1.5 metre) off the surface in shade what would the reading be? To further specify the ...
GGizmos's user avatar
  • 143
7 votes
2 answers
1k views

When there is more power than needed, are satellite photovoltaics shunted or open circuit?

I saw the word "shunts" in this answer about DSCOVR's upgraded photovoltaic arrays when it was unmothballed and readied for space. Reading it, I get the idea that shunts are used to dissipate the ...
uhoh's user avatar
  • 149k
6 votes
1 answer
2k views

Supply of liquid oxygen (LOX) maintained on the ISS? Kept cold using "space", or refrigerator?

One can transport and store oxygen more efficiently (volume and weight of tank) if it is liquid under the order of 1 atmosphere. Liquid oxygen (LOX) is kept cryogenic in insulated tanks for short ...
uhoh's user avatar
  • 149k
1 vote
2 answers
345 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
545 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
684 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
3 votes
1 answer
1k views

ViaSat's 18 kW solar array - largest ever for a commercial telecom satellite?

Now that the protests at Kourou Space Center in French Guiana are over, Arianne has launched both EutelSat 172B and ViaSat-2 as 2017-029A. While EutelSat 172B has a ...
uhoh's user avatar
  • 149k
3 votes
1 answer
780 views

How will GOES-R simultaneously point some instruments down at Earth and others sunward?

GOES-R is scheduled to launch soon and put in geostationary orbit over North America for high bandwidth continuous monitoring of Earth, with only 120 minutes per year interruptions caused by ...
uhoh's user avatar
  • 149k
3 votes
1 answer
956 views

Is it possible to capture geostationary satellites with DSLR?

DSLR is to be mounted on a tripod and pointed at sky with a zoom lens. Would a sufficiently long duration of exposure reveal these non-moving satellites as bright "stars" amongst the streaks caused ...
karthikeyan's user avatar
  • 4,479
2 votes
2 answers
237 views

Mars Watershield Greenhouse Question

I was reading about Martian greenhouses earlier today and I saw this image: Would this be feasible? Would the water need to be cooled/heated up to prevent things like water condensation from forming ...
opaque_dragon's user avatar
2 votes
0 answers
226 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