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OneWeb successfully launches 34 more satellites into orbit

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Re: OneWeb successfully launches 34 more satellites into orbit

#11
post #2

between this and Elon's stuff, how long till it is impossible to do astronomy or safely launch anything into space?

How long until the most remote and poorest populations in the world can access jobs and the worlds collective knowledge on the internet?

That’s a much better question to ask, mr negative.

Re: OneWeb successfully launches 34 more satellites into orbit

#12
post #2

between this and Elon's stuff, how long till it is impossible to do astronomy or safely launch anything into space?

Spreading FUD. Spacex has the most advanced satellite management and deorbiting systems ever made. Fully approved by the fcc.

Re: OneWeb successfully launches 34 more satellites into orbit

#13

Earlier quoted context omitted.

I believe GP was talking about the ever growing space debris. https://www.esa.int/Safety_Security/Space_Debris/Space_debri...

These satellites should be in low enough orbits that any junk from them burns up in the atmosphere as their orbits decay. Maybe there could be an issue from collisions in low orbit pushing objects into higher orbits but those likely would be erratic orbits with low points that still subject it to decay.

[deleted]

Re: OneWeb successfully launches 34 more satellites into orbit

#14
When will this be available to the general public? I've heard of so many different "internet from space/the sky" schemes from Google Loon to SpaceX to this but I've never once been able to connect to a node to give it a whirl. I'm sure it's a difficult technical challenge but it does seem to be taking a long time!

Re: OneWeb successfully launches 34 more satellites into orbit

#15
post #2

between this and Elon's stuff, how long till it is impossible to do astronomy or safely launch anything into space?

Spreading FUD. Spacex has the most advanced satellite management and deorbiting systems ever made. Fully approved by the fcc.

That accounts for access to space.

Like it or not, there are astronomers pretty pissed off about Starlink & co.

https://twitter.com/superasassn has been pretty open about it, for example. https://twitter.com/89Marvaz/status/1196356715270291456 as well.

Re: OneWeb successfully launches 34 more satellites into orbit

#16
post #10
post #2

between this and Elon's stuff, how long till it is impossible to do astronomy or safely launch anything into space?

If you spread 50,000 cars over the surface of the planet, how much of the Earth's surface do you think would be blocked from view by the ISS? Because we have millions of cars scattered all across the Earth and from space, you can't even tell they're there. >how long I'd say at least until there are more satellites than cars. In other words, not gonna happen.

This is a poor comparison. The contrast of a cars to the background of Earth is low, ofcourse we can not see any. Remove Earth and let these cars fly on orbits 500km below ISS and, oh boy, would you suddenly see car roofs and windows glinting in the dark everywhere.

Amazing for satellite watchers and annoying for astronomers were e.g. Iridium flares. See [0][1]. Worst case for Iridium flares was them being about 50x as bright as planet Venus. Starlink satellites have the advantage of orbiting far lower which puts them into Earth's shadow on part of their orbits. Around midsummer, though, satellites in an orbit at 550km, like Starlink's lowest shells, will be lit by sunlight as soon as they cross northwards over ~ 45° latitude (their orbits have an inclination of 53°, so they definitely do this). I'm going out on a limb here but they might interfere with infrared observations because of emitted heat (being exposed to bright sunlight every half orbit heats them up).

Parent poster was most likely also referring to the Kessler Syndrome [2] when talking about safety.

[0] https://youtu.be/MTGVuPr9Epg?t=100

[1] https://en.wikipedia.org/wiki/Satellite_flare#Iridium_flares

[2] https://en.wikipedia.org/wiki/Kessler_syndrome

Re: OneWeb successfully launches 34 more satellites into orbit

#17

When will this be available to the general public? I've heard of so many different "internet from space/the sky" schemes from Google Loon to SpaceX to this but I've never once been able to connect to a node to give it a whirl. I'm sure it's a difficult technical challenge but it does seem to be taking a long time!

Likely never.

OneWeb is about to go bankrupt. Launching is a way for SoftBank to still claim spectrum rights.

Re: OneWeb successfully launches 34 more satellites into orbit

#18

When will this be available to the general public? I've heard of so many different "internet from space/the sky" schemes from Google Loon to SpaceX to this but I've never once been able to connect to a node to give it a whirl. I'm sure it's a difficult technical challenge but it does seem to be taking a long time!

Likely never. OneWeb is about to go bankrupt. Launching is a way for SoftBank to still claim spectrum rights.

GP might want to look here: https://www.bloomberg.com/news/articles/2020-03-19/softbank-...

Re: OneWeb successfully launches 34 more satellites into orbit

#19
post #2

between this and Elon's stuff, how long till it is impossible to do astronomy or safely launch anything into space?

Let's put this to rest for once and all. The average radius of Earth is 6,371 km. Initial sats will be at 550 km height (many will be higher, many somewhat lower, but does not make much diff.) So the surface of the 6,931km radius globe is ~603,672,875 km2 (~604 million square kilometers). Don't have exact size for a Starlink sat, but a good upper bound is 3 x 2 m, i.e. 6 m2 = 0.000006 km2. Let's say there will be 40,000 such sats at peak, so altogether they occupy 0.24 km2 area. Altogether, they will occupy 0.00000003976% of the sky. QED.

Re: OneWeb successfully launches 34 more satellites into orbit

#20
post #4
post #2

between this and Elon's stuff, how long till it is impossible to do astronomy or safely launch anything into space?

Most astronomy is done with computers. It should be easy for a computer to ignore or subtract all known satellites. If you only get 900 exposures of some new comet instead of 1000, that's still plenty. And we'd need many orders of magnitude more satellites to make 10% of astronomical photos unusable. I hear the astronomy argument all the time, but I just don't believe it. If satellites are ever cheap and plentiful en…

>the astronomers can launch a thousand Hubble-style space telescopes

Who pays? The public pays for telescopes and Elon and other billionaires make more money from the internet satellites and now from putting this new telescopes up , I would be fine if SpaceX and the others would have to pay a tax that will fund astronomical telescopes on Earth and space.

About the astronomy is done with computers, there are problems that you can't jsut solve by throwing a computer at it and if there is a solution it probably costs.

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