Recent comments in /f/space
bowties_bullets1418 OP t1_j5ba5b3 wrote
Reply to Local update on Saturn IB removal. More details given by US Space & Rocket Center. by bowties_bullets1418
We've also got a post going on our local r/HuntsvilleAlabama if you would put your thoughts in please. Thanks guys!
[deleted] t1_j5ba4n9 wrote
bowties_bullets1418 t1_j5b9xpo wrote
Reply to Iconic Saturn 1b rocket at Alabama rest stop off I-65, near Tennessee border, will be removed. by 91361_throwaway
Little late, but any attention helps! I posted it a few days ago. Here's an update from our local WHNT I also just posted. We've also got a post going on our r/HuntsvilleAlabama I'll link here.
https://whnt.com/news/athens/space-and-rocket-center-provides-further-details-on-saturn-1-removal/
LeadOnion t1_j5b9pth wrote
Reply to comment by [deleted] in Djibouti in Horn of Africa on track for spaceport following deal with Hong Kong firm, six years after opening of Chinese naval base by Saltedline
That’s an oversimplification.
[deleted] t1_j5b1mhb wrote
Reply to Djibouti in Horn of Africa on track for spaceport following deal with Hong Kong firm, six years after opening of Chinese naval base by Saltedline
China on top, USA on the bottom. Welcome to the new age.
OnlyAstronomyFans t1_j5avby1 wrote
Reply to comment by darrellbear in Trying to observe the upcoming C/2022 E3 (ZTF) Comet with binoculars by EstablishmentOk1324
I second this. Even small binoculars get heavy after a while and high magnification it’s pretty hard to hold steady.
[deleted] t1_j5auwik wrote
darrellbear t1_j5aud0d wrote
Reply to Trying to observe the upcoming C/2022 E3 (ZTF) Comet with binoculars by EstablishmentOk1324
Any bino over 10x needs tripod support. A 16x32mm bino will have a 2mm exit pupil, which is terrible, especially for night time use.
jeeepblack t1_j5atpzo wrote
Reply to comment by 91361_throwaway in Iconic Saturn 1b rocket at Alabama rest stop off I-65, near Tennessee border, will be removed. by 91361_throwaway
Puttin' People On The Moon - Drive-By Truckers
Flaxinator t1_j5atlvd wrote
Reply to Djibouti in Horn of Africa on track for spaceport following deal with Hong Kong firm, six years after opening of Chinese naval base by Saltedline
Normally maritime exclusion zones are put in place down range when a rocket launches so that if it fails the debris can fall safely into the sea.
I wonder how Djibouti will manage this given that there are very busy shipping lanes going through the Gulf of Aden, just off the coast of Djibouti. Even ignoring that the range of orbits it can launch to will be quite limited unless they plan to launch over Somali or Yemeni territory.
91361_throwaway OP t1_j5askc3 wrote
Reply to Iconic Saturn 1b rocket at Alabama rest stop off I-65, near Tennessee border, will be removed. by 91361_throwaway
To clarify, this is not the Saturn Rocket at USSSC in Huntsville
Anonymous-USA t1_j5af6kl wrote
Reply to comment by Unlikely_Concept5107 in The critical atom (thought experiment) by ThePropagandaTower
Hard to say since no one actually knows what gravity is! 😆 But the distinction I was making is that a photon has no mass, so light doesn’t actually change directions due to gravity so much as it travels a strait line through a warped space-time.
ie. Gravitational force F=(G × M1 × M2) / D^2
Photon M2 has mass of 0. This suggests it could escape the black hole as there’s no gravitational force between them, but obviously it cannot due to the curvature of space.
CrimsonEnigma t1_j5a7xdq wrote
Reply to comment by ttystikk in Djibouti in Horn of Africa on track for spaceport following deal with Hong Kong firm, six years after opening of Chinese naval base by Saltedline
Based on the headline alone, China also has a military base in the country.
[deleted] t1_j5a750p wrote
Reply to comment by ttystikk in Djibouti in Horn of Africa on track for spaceport following deal with Hong Kong firm, six years after opening of Chinese naval base by Saltedline
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egregiouscodswallop t1_j5a6jmt wrote
Since the explosive forces, swirling gasses, and gravitational rotations create a total force that is NOT spherical, there is likely a window of time when part of your blackhole requires an FTL escape velocity while the other hemisphere still lets loose photons and gamma rays. So a critical atom (singular)? No, probably not. There is also an accretion disc around blackholes which block and reflect light back into the central mass. So for a non-zero amount of time, the blackhole is not trapping photons but the blackhole system (the Greater Metropolitan Blackhole) does effectively trap everything.
Tl;dr there would be a window of time and mass during which your escape velocity is sub c but nothing escapes AND/OR your escape velocity reaches c but not uniformly in a sphere.
[deleted] t1_j5a52kp wrote
Reply to NASA prepares next steps in development of future large space telescope by ye_olde_astronaut
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Sykowsh t1_j5a1wnx wrote
Reply to comment by bgplsa in The critical atom (thought experiment) by ThePropagandaTower
Also relativity. Your atom with speed of just a tiny bit lower than speed of light would have such a relative mass on itself, that it could under the influence of your BH create some sort of space censure around itself,
from the perspective of an outside observer. ....or I confuse apples with pears.
Unlikely_Concept5107 t1_j59tlj0 wrote
Reply to comment by Anonymous-USA in The critical atom (thought experiment) by ThePropagandaTower
Im no expert but isn’t “gravity” and “warped spacetime” really just the same thing?
citybadger t1_j59r94t wrote
Reply to comment by bgplsa in The critical atom (thought experiment) by ThePropagandaTower
Light climbing out a gravity well loses energy. Unlike a object with mass, it doesn’t slow down as it loses energy, because it’s light - it can’t slow down. So it instead gets lower in frequency - “red-shifted”. Gamma rays become X-rays, which become ultraviolet light, which become blue visible light, which become red visible light, then infrared, microwave, and radio. Visible light climbing out of ordinary neutron star will be red shifted. Some of the red light will be invisible because it shifted into infrared.
ttystikk t1_j59pbgz wrote
Reply to Djibouti in Horn of Africa on track for spaceport following deal with Hong Kong firm, six years after opening of Chinese naval base by Saltedline
The US has a military base in the country, while China is building a spaceport.
That's an interesting snapshot of investment priorities.
boundegar t1_j59n2ra wrote
Question doesn't really make sense. Verb has no subject. Who or what is "going to the very limit?"
What you might be asking is if a neutron star gradually accretes mass, will it reach a threshold and collapse into a singularity, and the answer is yes, in theory. A bunch of gravitational waves would result, and I think scientists have detected waves with the right pattern - but there's no way to directly observe this.
[deleted] t1_j59k1xb wrote
Reply to comment by bgplsa in The critical atom (thought experiment) by ThePropagandaTower
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[deleted] t1_j59gk90 wrote
Reply to comment by ExtonGuy in The critical atom (thought experiment) by ThePropagandaTower
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PoppersOfCorn t1_j59b43o wrote
Reply to comment by TouchMehBewts in Pictures from the JWTS and reality. by Derpinator_420
The space race will always be for the wealthy, regardless if that is mining asteroids, moons, etc..
Pretty much all modern exploration has been funded by the wealthy.
The OP said, "I doubt we'll ever leave the solar system" and hence my reply...
CrimsonEnigma t1_j5bc51e wrote
Reply to comment by [deleted] in Djibouti in Horn of Africa on track for spaceport following deal with Hong Kong firm, six years after opening of Chinese naval base by Saltedline
Leave it to Reddit to cheer on a totalitarian dictatorship.