Last week, the answer was finally “yes.” And thankfully, after eight months of no communications, Voyager2 seems to be just fine.

On October 29, NASA’s Deep Space Network communicated with the Voyager 2 spacecraft for the first time since March of this year. The only radio antenna powerful enough to send and receive the faint signals from the 43-year-old spacecraft is the 70-meter-wide (230-foot-wide) Deep Space Station 43 dish in Canberra, Australia. But the behemoth radio dish has been offline for repairs and upgrades.

The communications last week were part of a test of the new hardware, but the upgrades aren’t finished yet.

“The work has not been completed on DSS43,” said Richard Stephenson on Twitter. Stephenson works in the Operations at Canberra Deep Space Communication Complex. “Shortly after confirming a good command link with Voyager 2 the engineering team went back to work on more structural upgrades. The antenna still has to be optimized for X-Band which needs clear skies and a couple of weeks work.”

NASA said they expect the work to be wrapped by in February 2021. Currently, it takes about 17 hours and 25 minutes for a signal to reach Voyager 2, and then then same amount of time for the spacecraft to send a signal back to Earth (You can see the current data on the two Voyager spacecraft here.)

During the repairs, Voyager 2 has been “flying solo,” based on the final commands it received before the Canberra dish was taken offline. Voyager 2 returned a signal confirming it had received the “call” and executed the commands without issue.

Among the upgrades to DSS43 are two new radio transmitters. One of them, which is used to talk with Voyager 2, hasn’t been replaced in over 47 years. Engineers have also upgraded heating and cooling equipment, power supply equipment, and other electronics needed to run the new transmitters.

Every now and again there’s a perspective shot that prompts a “Wow! that’s big” comment. Watching the guy walking across the dish surface towards the dish hoist is one of those shots.

“What makes this task unique is that we’re doing work at all levels of the antenna, from the pedestal at ground level all the way up to the feedcones at the center of the dish that extend above the rim,” said Brad Arnold, the DSN project manager at NASA’s Jet Propulsion Lab. “This test communication with Voyager 2 definitely tells us that things are on track with the work we’re doing.”

The Deep Space Network consist of radio antenna facilities spaced equally around the world. They are located in Canberra; Goldstone, California; and Madrid, Spain. The positioning of the three facilities ensures that almost any spacecraft with a line of sight to Earth can communicate with at least one of the facilities at any time.

However, the dish in Canberra is the only one capable of communicating with Voyager 2. In order to make a close flyby of Neptune’s moon Triton in 1989, the probe flew over the planet’s north pole. That trajectory deflected it southward relative to the plane of the planets, and it has been heading in that direction ever since. Now more than 11.6 billion miles (18.8 billion kilometers) from Earth, the spacecraft is so far south that it doesn’t have a line of sight with radio antennas in the Northern Hemisphere.

The upgrades for DSS43 will be beneficial for other deep space missions, too, especially for the landing of the Perseverance rover on Mars on February 18, 2021.

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In this week’s questions show, I talk about the Dark Forest theory in the Three-Body Problem series of books. Is it a compelling answer to the Fermi Paradox? How much of a risk is dust to interstellar travel? Is black hole evaporation negated by black holes absorbing additional material and energy?

00:00 Start
00:46 Is the Dark Forest a reasonable answer to the Fermi Paradox?
04:05 How much dust is in interstellar space?
05:57 Can we go faster than the Voyagers?
08:24 Are black holes gaining mass faster than they’re evaporating?
10:07 Is abiogenesis happening right now?
13:47 How do we calculate the habitable zones around other stars?
15:45 How close can binary stars be and still be habitable?
17:50 Could we find debris in the Lagrange Points?
19:27 Can gravitational waves let us see past the CMB?
22:07 What is a galactic halo?
23:49 Are there gas dwarfs?

Want to be part of the questions show? Ask a short question on any video on my channel. I gather a bunch up each week and answer them here.

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Voyager 2, NASA, Voyager program

World news – THAT – The Only Radio Antenna Capable of Communicating with Voyager 2 Came Back Online During Repairs and Upgrades. Contact Re-established – Universe Today

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