Komentarze

threelonmusketeers, 8 miesięcy temu do esa w When Europe needed it most, the Ariane 6 rocket finally delivered

With more launch, the price per rocket should decrease

Should it? Are you referring to amortizing the costs of development, or optimizing the production cost of each rocket? No portion of Ariane 6 is reusable, so it’s not like they can get more launches out of each rocket…

threelonmusketeers, 8 miesięcy temu do astronomy w We planned for the unexpected, say stranded Nasa astronauts from space station

stranded Nasa astronauts

They are not currently stranded, and were never considered stranded, except maybe for the few days between Starliner’s empty return and the Crew-9 Dragon’s arrival.

This also isn’t really relevant to astronomy.

threelonmusketeers, 8 miesięcy temu do esa w SpaceForest Completes Full-Duration Test of Hybrid Rocket Engine

Fuel and oxidizer are different phases: en.wikipedia.org/wiki/Hybrid-propellant_rocket

In the case of the SF-1000, it sounds like the fuel is a solid wax and the oxidizer is liquid nitrous oxide.

spaceforest.pl/rocket-technologies/

threelonmusketeers, 8 miesięcy temu do esa w Solar Orbiter ready for close encounter with Venus

Today’s flyby will be the first to significantly ‘tilt’ the spacecraft’s orbit and allow it to see the Sun’s polar regions, which cannot be seen from Earth.

Huh, it never occurred to me that we haven’t seen what the Sun looks like from above or below the plane of the solar system.

threelonmusketeers, 9 miesięcy temu do astronomy w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

Yeah, even for Lemmy this is bad. I hope most of them are semi-facetious?

threelonmusketeers, 9 miesięcy temu do astronomy w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

Provided it enters in a similarly uninhabited location.

threelonmusketeers, 9 miesięcy temu do esa w ESA to Launch In-Orbit Refuelling Demonstration Mission

I wish they mentioned what propellant they’ll be testing. I’m assuming some hypergols or some gas for ion thrusters.

threelonmusketeers, 9 miesięcy temu do astronomy w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

Technically the solar system is a multi-body system, and everything nudges everything else, but the mass of the earth is far greater than the mass of the asteroid, to the point that it doesn’t matter.

threelonmusketeers, 9 miesięcy temu do astronomy w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

!anythingbutmetric

threelonmusketeers, 9 miesięcy temu do astronomy w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

Listed in the article:

Scientists estimate that 2024 YR4 is between 130 to 300 feet (40 and 90 meters) wide

threelonmusketeers, 9 miesięcy temu do astronomy w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

Wouldn’t detonating on the forward side rather than the zenith side be most effective at lowering the perigee of the moon?

threelonmusketeers, 9 miesięcy temu (edited 9 miesięcy temu) do astronomy w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

Florida

You jest, but the Kennedy Space Center is in Florida. Putting the world’s busiest spaceport out of commission might put a damper on future asteroid deflection missions…

threelonmusketeers, 9 miesięcy temu do astronomy w Don’t panic, but an asteroid has a 1.9% chance of hitting Earth in 2032

Just in case this comment is not a joke, here’s the WHO page on suicide prevention.

Either way, there are a few billion other people on this planet who would rather not die by meteor, thank you very much.

threelonmusketeers, 9 miesięcy temu do esa w [Eric Berger] Europe has the worst imaginable idea to counter SpaceX’s launch dominance

There’s only so much you can do when your ranges are literally on the other side of the planet.

Is suppose French Guiana is a bit far, but Andøya, Esrange, and Saxavord all have plans for orbital launches, don’t they?

threelonmusketeers, 9 miesięcy temu do esa w [Eric Berger] Europe has the worst imaginable idea to counter SpaceX’s launch dominance

Why not invest in a bunch of the smaller companies like Rocket Factory Ausburg, PLD Space, MaiaSpace, HyImpulse, etc? They won’t all be successful, but if just a couple of them are, the competition would put Europe in a much stronger position than if they were to establish Euro-ULA.