Questions tagged [radio-astronomy]

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Is it possible to generate a signal strong enough that it could be received on Alpha Centauri with today's technology?

Let's say we magically found out that there is an inhabited planet in the Alpha Centauri system and that the inhabitants there have the same level of technology that we do. Similarly, they know of our ...
Vilx-'s user avatar
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4 votes
1 answer
204 views

Radio Telescope / DSN Node in L4 and/or L5

Deploying really big radio dishes in space seems to be possible and "frequently" done with SIGINT satellites in geosynchronous orbit (like the assumed specs of the Orion satellite class). ...
TrySCE2AUX's user avatar
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2 votes
1 answer
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Following KRT-10 aboard Salyut-6, have there been any other radio astronomy observations from a space station or crewed capsule?

Space stations have certainly been equipped with infrared, visible, ultraviolet and X-ray telescopes for astronomical observation and optical and X-ray communications as well as particle telescopes ...
uhoh's user avatar
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10 votes
2 answers
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Can we use something like RADAR to detect asteroids?

I know that detecting asteroids is difficult because many of them we find are the ones that reflect sunlight but can we use something like RADAR to detect others?
Ch.Siva Ram Kishore's user avatar
1 vote
1 answer
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Are these good specifications for a X-Band High Gain Antenna?

Currently, I have that for a X-Band High Gain Antenna functioning at 8Ghz, diameter of 3 meters, and a power transmission of 13.1dBW(20Watts) at a distance of about 8.5AU has a Gain of 52.44dBi, free ...
Jose De La Pena's user avatar
2 votes
1 answer
208 views

Specifications of a High Gain Antenna

I am designing a telecommunications device capable of redundant communication from Earth to Saturn's moon Enceladus which ranges from 8 to 11 AU from Earth. I have decided on an X-band high-gain ...
Jose De La Pena's user avatar
5 votes
1 answer
178 views

How do the small radio receivers on space probes catch enough of a signal to communicate with us?

From Scientific American, March 2021: Optics. Traveling Photons. Joanna Thompson. Much of today's space communication relies on radio signals. But these diffract and broaden as they travel, as ...
Kurt Hikes's user avatar
8 votes
3 answers
1k views

Arecibo: Advantages of Giant Dish?

I'm sure all of you have heard about the recent events at the Arecibo observatory, and the controversial decision to close the facility. I've also heard that Arecibo is the second largest single ...
Zhaochen He's user avatar
4 votes
1 answer
218 views

What's the status and timeline for Millimetron? (Russia's 10m Deployable Antenna cooled to 6 K Earth-Space VLBI)

Comments below an answer to How does NASA's ASTHROS stratospheric telescope compare to its James Webb space telescope? link to JPL's Paul F. Goldsmith's The Renaissance of High Resolution ...
uhoh's user avatar
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1 vote
0 answers
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What novel technologies did DARE ditch in order to get NASA support?

Business Insider's NASA patented a faster, cheaper route to the moon. The first spacecraft to use it could make Nobel Prize-winning discoveries about the universe. includes a section titled 2 Nobel ...
uhoh's user avatar
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4 votes
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Has VLBI been done using any space-based receivers besides Spektr-R?

As discussed in Infrared space interferometry - Why isn't it being done? the space-based radiotelescope Spektr-R has been used in Very Long Baseline Interferometry or VLBI. See also What are Spectr-R'...
uhoh's user avatar
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1 answer
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How is Spektr-R doing these days?

Under the question What are Spectr-R's major contributions to radio astronomy that could not have been done from Earth? there is a new comment that points (again) to the BBC News article Spektr-R: ...
uhoh's user avatar
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2 votes
0 answers
382 views

What are Spectr-R's major contributions to radio astronomy that could not have been done from Earth?

R. I. P. Spektr-R Spektr-R Spektr-R (37755, 2011-037A) is a Russian radiotelescope spacecraft in a very high orbit around the Earth. It's orbit is cis-lunar with ...
uhoh's user avatar
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3 votes
1 answer
421 views

Is the recently discovered VLF-induced radiation barrier in any way important or useful?

There are several popular news articles that refer to this video, who's notes point to the NASA news item NASA's Van Allen Probes Spot Man-Made Barrier Shrouding Earth which points to the ...
uhoh's user avatar
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3 votes
1 answer
440 views

Was it a "Soviet military satellite not in any of the catalogs?"

I can't connect to the Tass news item directly http://tass.com/science/896683 but on a SETI page an item dated August 31, 2016 says: An article that quotes the Russian news agency TASS is ...
uhoh's user avatar
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