Linked Questions

19
votes
3answers
2k views

Why not send Voyager 3 and 4 following up the paths taken by Voyager 1 and 2 to re-transmit signals of later as they fly away from Earth?

Voyager 1 and Voyager 2 spacecrafts are on their journey out of solar system. They collected so much of important data that helped us understand our solar system. As these spacecrafts moving out of ...
9
votes
5answers
4k views

Why haven't telescopes been sent to other planets?

Why haven't we sent telescopes to other planets? Wouldn't we be able to see further? Aren't we interested in seeing further without having to send a probe that will take years to get to where it's ...
7
votes
3answers
485 views

What are these circular structures around the rocket?

Youtube video of the Iridium-6/GRACE-FO NASA Launch (Falcon 9 SES-12). Edit 31 May: Too bad they have changed the content of the video (and still call it 'live'), so that you can no longer see the ...
4
votes
2answers
137 views

What is the process to produce a chemical composition spectrum of a celestial body?

I have come across this spectrum, which depicts the chemical composition of Titan's atmosphere: Taken from here. I would like to know how do scientists generate such spectra, starting with capturing ...
8
votes
2answers
100 views

What is the highest resolution camera on a Mars orbiter?

The GeoEye-1 satellite has the high resolution imaging system and is able to collect images with a ground resolution of 0.41 meters (16 inches) How about Mars then? From all the Mars orbiter's cameras,...
5
votes
1answer
470 views

What's the largest optical telescope mirror ever put in space?

As a follow-on question to What's the largest optical lens put in space? I'd like to ask about mirrors this time. Question: What's the largest optical telescope mirror ever put in space? Optical ...
8
votes
1answer
313 views

Any news about the Mars-3 landing site since early 2013?

The image below of Mars' surface and text is from the NASA JPL Photojournal Catalog: PIA16920: Could This Be the Mars Soviet 3 Lander? The latest data shown for the Mars 3 site in Wikipedia is from ...
2
votes
2answers
196 views

Quantitatively, why will optical communication be better than X-band for deep-space communications?

In a question about communicating with Voyager, an answer asserts: [70 meter dish antennas deployed in space] just isn't done, and it probably won't be, since optical communication is definitely ...
2
votes
1answer
131 views

What's the largest area dish antenna sent beyond the Earth-Moon system?

In the same vein as the question What's the largest aperture telescope sent beyond the Earth-Moon system?, I'd like to ask, what's the largest area antenna dish sent beyond the Earth-Moon system? If ...
4
votes
1answer
210 views

What's the largest optical lens put in space?

While star cameras and wide angle cameras in space are built from glass lenses, large aperture optical systems generally use reflective optics. For some large ones see answers to What's the largest ...
3
votes
1answer
196 views

Can HiRISE photograph Starman?

On Oct 7, 2020, according to the latest predictions, the Tesla Roadster/ Starman will pass within 0.05 AU (7.4 million km). Could HiRISE image it with any success, and as anything but a dot?
1
vote
1answer
75 views

What was the effective magnification of the Mars Reconnaissance Orbiter's HiRISE camera to acquire the detailed image of Earth?

On October 3, 2007 NASA's Mars Reconnaissance Orbiter HiRISE camera acquired this image of the earth and the moon from Mars The oceans and clouds can be easily distinguished and "the west coast ...
-7
votes
3answers
205 views

Lot 345 of Christie's “Voyage To Another World” auction supposedly has the only photo of Armstrong on the Moon, but isn't this one also?

Christie's press release Christie's Voyage to Another World: The Victor Martrin-Malburet Photograph Collection includes the following: Lot 345, The only photograph of Neil Armstrong on the Moon, July ...