Recent comments in /f/space
yongedevil t1_j6r2d67 wrote
Reply to comment by dirtballmagnet in NASA is funding ideas for a Titan seaplane and faster deep space travel by fchung
>Nor do I know what SGL is, or why you'd want to floor it to get there.
Solar Gravitational Lens. We can use the sun's gravity to focus light like a telescope. However the sun doesn't bend light much so the focal point is something around 500 AU out. For reference, the Voyager probes are only around 150 AU out.
[deleted] t1_j6r1nfd wrote
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[deleted] t1_j6r0hbp wrote
Reply to comment by dirtballmagnet in NASA is funding ideas for a Titan seaplane and faster deep space travel by fchung
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dirtballmagnet t1_j6qyvgt wrote
Man, I just looked at one of the project abstracts and felt like I came in fifteen minutes late to a science fiction disaster film. Do what now?
>To address the urgent need for advanced propulsion solutions, we propose
the development of a nuclear fission fragment rocket engine (FFRE) that
is exponentially more propellent efficient than rocket engines
currently used to power today's space vehicles and could achieve very
high specific impulse (>100,000 sec) at high power density
(>kW/kg). ... NIAC work will provide detailed mission analysis of fast transit to SGL
for direct imaging and high-resolution spectroscopy of a habitable
exoplanet at a distance of up to 100 light years. The FFRE propulsion
system could provide delta-V to reach the SGL in less than 15yrs and
provide the slowdown and maneuvering capability at SGL.
A hundred thousand second Isp, you say? Let me just plug that into Kerbal Engineer Redux.
And sorry, I don't know what the urgent need is. Nor do I know what SGL is, or why you'd want to floor it to get there.
Bahiga84 t1_j6qorw1 wrote
The big telescopes have long waiting lists of scientists that want to use them for their research. After they gathered the Data, they spend months interpreting the Data to publish it. If that Data is available to anyone immediatly (live stream), others would try to publish it under their own names and would claim the fame of the initial scientists who had all the work. After all, they dont point it randomly at the sky, but have a scientific scope which they had to propose before getting time on the telescope. It just would'nt be fair to those people, that had all the work, just for others to claim the first publication afterwards. And yes, there are groups that do this, and thats how the academic world works. First publisher gets all the fame and recognition.
In case of special Events though, the idea is pretts cool.
mustafar0111 t1_j6q155e wrote
You can technically rent telescope time at some observatories.
I don't see why this couldn't be done though. With EAA and like stacking being a thing now people should be able to live stream their camera feeds if they really want to.
I suppose I could try it one night.
go_comatose_for_me t1_j6pzccl wrote
I had never even thought of this. What a great idea.
MoreScholar6521 t1_j6pj7m9 wrote
Reply to Stargazing spots in Los Angeles? by NstyBum
Palos verdes / palos verdes estates. Pacific palisades way up in the hills. Top of Mandeville or canyons in Brentwood. Spots off Mulholland.. I’d say go towards the Santa Monica mountains and hills. Also Malibu state creek park (or something?), used to rock climb there a while back…
[deleted] t1_j6piruv wrote
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Massive-Woodpecker65 t1_j6pikqn wrote
Reply to Stargazing spots in Los Angeles? by NstyBum
In Palos Verdes there's a lighthouse that has a parking lot . The hills block all of the light pollution from Los Angeles
TheUmgawa t1_j6pgroy wrote
Reply to comment by FanOfPeace in 2 big pieces of space junk nearly collide in orbital 'bad neighborhood' by jeffsmith202
On the upside, it also provides natural protection against alien invasion. You gotta look at the glass as half full.
RhesusFactor t1_j6pfuzu wrote
Reply to comment by SlightComplaint in 2 big pieces of space junk nearly collide in orbital 'bad neighborhood' by jeffsmith202
You'd hope they do but many are not implementable in a quick manner or to the scale we have achieved with space based services. The question was about if they all failed at once, which is why we are quite concerned about coronal mass ejection and other space weather that could knock out our space systems all at once.
There are ground based PNT/augmentation seeking to lessen reliance on GNSS/space based PNT.
The US considers some of these capabilities as critical infrastructure with limited alternatives. Some are unique like the ISS and Hubble.
Remarkably GNSS is one of the largest components of the space industry. Near everything has gps or timing requirements now. https://brycetech.com/reports/report-documents/Bryce_2019_Global_Space_Economy.png
[deleted] t1_j6pf2kt wrote
Reply to comment by Leather-Mundane in NASA and DARPA to partner on nuclear thermal propulsion demonstration by returnofjuju
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Leather-Mundane t1_j6pepuq wrote
Reply to comment by Radioactiveglowup in NASA and DARPA to partner on nuclear thermal propulsion demonstration by returnofjuju
Look it up and you'll find that coal is more polluting than nuclear by a large percentage.
PandaEven3982 t1_j6pe1xn wrote
Reply to comment by [deleted] in If the concepts of Project Orion were proven, why don't we use them for space guns? by [deleted]
Ha. The elevator mount includes a layup maneuver. Catch the hook at Angels 20?
simcoder t1_j6pdckb wrote
So...blow even more money on the military? I thought we were already doing that?
K3yb0r3d t1_j6pd6pw wrote
"Your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should." — Ian Malcolm, Jurassic Park
SlightComplaint t1_j6pbnjc wrote
Reply to comment by RhesusFactor in 2 big pieces of space junk nearly collide in orbital 'bad neighborhood' by jeffsmith202
Surely many of these systems have a terrestrial backup.
Rumo-H-umoR t1_j6pbi3r wrote
These are Android apps i can recommend. Maybe they are available for iOS too:
Besides NASA: Try European Space Agency (ESA)
There's "European Space Agency (ESA)TV" News app about ESA
There are some apps that give information about specific Satellites and their data:
ESA Cryosat
ESA Aeolus
Copernicus Sentinel
ESA Heritage Missions
For Rocket launches:
Next Spaceflight
Space Launch Now
For Stargazing and Satelitte-Tracking:
Heavens Above
Sky Map
ISS on Live
Satellite Tracker
[deleted] OP t1_j6pay4j wrote
Reply to comment by PandaEven3982 in If the concepts of Project Orion were proven, why don't we use them for space guns? by [deleted]
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rocketsocks t1_j6pa4gg wrote
Reply to comment by wanderlustcub in A spaceflight disaster was narrowly avoided in 1972. A series of intense solar flares exploded in August, just months before the launch of Apollo 17. Any astronauts on the moon at that time would have died from radiation. As NASA's new lunar missions progress, the threat of radiation still looms. by EricFromOuterSpace
There wasn't exactly a fixed schedule for Apollo missions, they could happen during any time of the year (within the launch windows during each lunar period, of course), there's nothing that would have prevented a launch from happening during that 4 month period other than just luck. The operational cadence of the program resulted in no missions happening at that time, but they could have.
Antares-777- t1_j6pa2p9 wrote
Reply to comment by ProfQuatermass42 in Green comet C/2022 E3 (ZTF) will be closest to Earth on Feb. 1. Here's how to see it. by burtzev
It isn't that far from north star now, so a good chunk of northern emispher is covered.
It sucks for who's from Southern emispher but at least not as elusive as those damn solar eclipses.
Anyway magnitude is around 5 so unless you have the tools and a nice dark place, won't see shit regardless.
It's a bummer but so it's life.
burtzev OP t1_j6p85qc wrote
Reply to comment by Vetiversailles in Green comet C/2022 E3 (ZTF) will be closest to Earth on Feb. 1. Here's how to see it. by burtzev
It's only a second best, of course, but there is a free webcast featuring our friend, the comet.
dirtballmagnet t1_j6r3gpt wrote
Reply to comment by yongedevil in NASA is funding ideas for a Titan seaplane and faster deep space travel by fchung
Oh that makes so much more sense now. Thank you!