spacenews.com

troyunrau, do astronomy w Senate bill would create center to study satellite interference with astronomy
@troyunrau@lemmy.ca avatar

This is a pop-science problem and not a real science problem. Any astronomy imaging system worth its salt has image stacking algos that remove transients easily enough.

Gnomie,

Here’s an actual scientist saying the number of satellites interferes with astronomy.

troyunrau,
@troyunrau@lemmy.ca avatar

Hi, it’s me. An actual scientist. Did grad school in planetary science. The same techniques we use to spot asteroids are the techniques used to spot satellites. But removing them is even simpler. It’s not algorithmically hard at all.

In fact, it’s so simple that I’ll write it out: take several images (at least three) in quick succession and take the median value across those images.

Oh hey, that was easy. Makes a good despeckle filter too for cosmic ray strikes or whatever else.

verity_kindle, do esa w Europe aims to end space access crisis with Ariane 6's inaugural launch
@verity_kindle@sh.itjust.works avatar

It seems to be all talk and no rock. Do some manned flights, ESA, and we’ll see.

Tar_alcaran,

Why? Ariane 6 seems more like a Strategic need being filled than a useful launch platform.

verity_kindle,
@verity_kindle@sh.itjust.works avatar

Strategic need in terms of economics?

saltesc, do esa w Europe funds inflatable satellite drag sail demonstration

The system is designed to be initially 20 square centimeters in size but would inflate about 7,500 times larger to around 1.5 square meters, increasing atmospheric drag to accelerate deorbiting.

The only thing more impressive than seeing that expand out would be watching them pack it down.

threelonmusketeers,

Now I’m imagining bits of the sail bulging out of the rocket fairing like a hastily-packed sleeping bag at the end of a camping trip.

saltesc,

After decades of camping, I only recently found out most (modern) sleeping bags are actually meant to be stuffed in their bags, not rolled up. Just kinda keep stuffing it in there and they seem to naturally fill gaps better than if they were rolled up first, so they’re easier and much faster to pack away.

There’s a random LPT for ya.

threelonmusketeers,

Huh, TIL. Thanks!

humanspiral, do astronomy w Astronomers seek global ban on space advertising

This is Barbara Streissan publicity when you had never thought about her for 50 years. We must all agree to a ban to stop China from working on it, while we “debate American freedom”

BrundleFly2077, do esa w ESA, OpenCosmos sign contract for NanoMagSat mission

What an unfortunate photograph of those two people. Of all the ones they might have picked 😳

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