threelonmusketeers

@threelonmusketeers@sh.itjust.works

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threelonmusketeers,

Yes, but also no.

Each side of the triangular array will measure nearly 1.6 million miles, or 2.5 million kilometers.

The satellites themselves may be small, but the interferometer antenna they’ll collectively form will be huge.

Brought my Celestron NexStar 6SE out on a camping trip last weekend and pointed it at the moon (lemmy.world)

Was out with a bunch of fellow geologists, who all got a kick out of looking at Saturn and the moon. Was only taking pictures with my phone, and so didn’t get a good shot of Saturn, but thought this one of the moon was nice.

threelonmusketeers,

Super cool photo, but does this technically count as astronomy? Isn’t astronomy “a camera on (usually) on earth, pointed up into space”, not the other way around?

threelonmusketeers,

Are you saying that observing the Earth should count as astronomy?

threelonmusketeers, (edited )

I wonder how close they can get the regolith stimulant to match actual lunar regolith.

threelonmusketeers,

Yeah, aluminium oxide particles may be a problem. Some scientists are experimenting with replacing aluminium with wood. I wonder if this would be feasible on future Starlink sats.

Elon Musk destroys astronomy

Observations with the LOFAR (Low Frequency Array) radio telescope last year showed that first generation Starlink satellites emit unintended radio waves that can hinder astronomical observations. New observations with the LOFAR radio telescope, the biggest radio telescope on Earth observing at low frequencies, have shown that...

threelonmusketeers,

From my brief look into the topic, interferometry tech is not quite there yet, but might be in the next few decades. Interferometry is more difficult with shorter wavelengths.

threelonmusketeers,

a massive asteroid smashed into the earth

Asteroid, or proto-planet?

threelonmusketeers,

x.com/esa/status/1830596526705365214

Watch the launch of @CopernicusEU on , the last Vega flight from Europe’s Spaceport, live on on 4 September from 02:30 BST/03:30 CEST (liftoff scheduled at 02:50 BST/03:50 CEST).

threelonmusketeers,

Launch postponed by one day: x.com/esa/status/1831104291710607603

update: the launch of @CopernicusEU from Europe’s Spaceport in French Guiana has been postponed.

Checks are being conducted to confirm a new launch attempt on 5 September at 02:50 BST/03:50 CEST.

More details from @Arianespace ⬇️

x.com/Arianespace/status/1831099750906765795

Due to electrical issues on the ground links launch chronology was interrupted.

Checks are being conducted to confirm a new launch attempt tomorrow Sept. 4 at 10:50 pm local time in Kourou.

The launcher & its passenger Sentinel-2C are in stable & safe conditions

threelonmusketeers,

Liftoff!

threelonmusketeers,

Stage 1 separation and stage 2 ignition confirmed.

threelonmusketeers,

Stage 2 separation and stage 3 ignition confirmed. Fairing separation confirmed.

threelonmusketeers,

Stage 3 separation and stage 4 ignition confirmed.

threelonmusketeers,

Stage 4 shutdown confirmed. Still a circularization burn remains.

threelonmusketeers,

Circularization burn underway.

threelonmusketeers,

Sentinel 2C payload separation confirmed!

threelonmusketeers,

Acquisition of signal from Sentinel 2C confirmed!

threelonmusketeers,

Webcast ending.

Goodbye Vega, hello Vega C!

threelonmusketeers,

First came across this project on DeepSkyVideos several years back. Glad to hear that it’s still going!

threelonmusketeers,

SRB separation confirmed!

threelonmusketeers,

Fairing jettison confirmed!

threelonmusketeers,

MECO, stage separation, and stage 2 ignition confirmed!

threelonmusketeers,

You’re welcome! Glad people find these threads useful!

threelonmusketeers,

That was one of the more cinematic stage separations I’ve seen in a while. Beautiful shot from the upper stage camera.

threelonmusketeers,

Seems like they might be between ground stations right now. Haven’t seen live video from the upper stage for a few minutes. Telemetry still looks good though.

threelonmusketeers, (edited )

Looks like we have SECO-1 and nominal orbit insertion!

Edit: Webcast commentary scheduled to resume T+52 minutes for a circularization burn and the first set of payload deployments.

threelonmusketeers, (edited )

Webcast commentary is back!

Edit: SES-2 confirmed!

Edit2: SECO-2. Nominal orbit confirmed. First payload deployments scheduled for T+1:05.

Edit3: Confirmation of cubesat deployments confirmed! Next up will be SES-3 at T+2:37.

threelonmusketeers,

x.com/esa/status/1810792159295180959

The tech-demo phase of Ariane 6 is still in progress but has shown an unexpected result which will only affect the end of the mission.

On the webcast, they stated that the Auxiliary Propulsion Unit (APU) switched off shortly after it it powered up after SECO-2. Without the APU, they have no way to settle the propellants in the tanks, and thus can’t reignite the upper stage for the final burn.

From the live camera feed, it looks as though the upper stage was spinning, so there may have been some loss of control as well.

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