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Level1SpaceTechs (astronomy)

astronomy

#1

Sup guys, i love all things space. i have  a doge shirt about space for god sakes. so i wana start a discussion about anything about space :)

i love following APOD for my daily space photos and reading on phys.org about comosmology and astronomy.

the lastest news is about the Maven Mar's orbiter. The slowdown burn proceeded without a hitch, and Maven is now in orbit around the red planet. 10 months in space and 11 years worth of planing. Pretty amazing.

 

http://arstechnica.com/science/2014/09/ten-months-and-442m-miles-later-nasas-maven-set-to-reach-mars-orbit/

http://www.youtube.com/watch?v=1Hm8b-L62y4


Massive astrophysical objects governed by subatomic equation: The Schrödinger
Devember 2018
#2

Obligatory:

These "uncommon" pics from the Apollo missions were on the imgur front page yesterday http://imgur.com/gallery/U8pSW Thought they were cool.


#3

Very cool... I've just started watching the new Cosmos series.


#4

beautiful


#5

http://www.youtube.com/watch?v=y4er-S_lNRs


#6

http://imgur.com/gallery/ixxRjAn from http://www.reddit.com/r/spaceporn/


#7

I kinda wish that we could build a Halo ring, it  would be very cool

 

 


#8

will probably have to mine half of mars or the asteroid belt to build it.


#9

yeah and it would be insanely cold,

If you want to build a giant ring, go all in and convert all the planets of the solar system into a ring around the sun at Goldilocks distance, like in the scifi book from 1970 Ringwold by Larry Niven.


#10

sounds like a dyson sphere too. hehe. 2nd level civilization yall.


#11
 
 

i remember when i was a kid about 7 years old reading astronomy books in the libary about quasars. how they were these mysterious radio sources deep in space. man we know so much about them now. Astronomers discovered that they are the energy release from the accretion of material into a superblack hole.

 

#12
 
 

i wonder what's causing these gigantic enegry bubbles?

http://phys.org/news/2014-09-sky-survey-gamma-ray-sources.html

think they would ever expand into our solar system?

maybe aftermath of a Tengen Toppa Gurren Lagann battle. lol

 

#13

no a Dyson sphere is not a good idea to live on, because how do you make the things inside the sphere, stick _to_ the sphere and prevent them from falling in the sun.

You can't spin it to use the centripetal force to make the objects stick on the inside because then everything inside the sphere would slide to the equator, and you would end up having about the same amount of space then a ring, but you'd have to pay for the hole sphere.

If you used some sort of gravity generators to make all the sphere habitable, you'd risk that if one generator-section fails it would create a giant vortex where all the atmosphere would get sucked into the sun. It would create a large air vortex and all the "chunks" that got loose, would act like a blender of epic proportions.

Also you would need a ridicules amount of anti asteroid canons, because such a large sphere would get pounded day and night. If a large asteroid were to puncture the sphere it probably would cause havoc inside, not to mention it could slingshot around the star gather speed and poke another hole in the sphere.


#14

Pretty sad to be honest, it took 8 years from start to finish to get people to the moon with I believe no prior manned space-flight experience and computers that our calculators make look like dinosaurs. The problem is space programs like nasa are bloated innefficent government bueracracies with little performance based incentives or goals.

Now that nuclear propulsion has been abandoned, these programs are pretty much pointless, the only way we can do materially usefull things in space (i.e. asteroid minning, large scale space construction, including human settlements on other planets) is going to be with nuclear propulsion and power generation. Solar power and chemical propulsion aint going to cut it. Perhaps you could shuttle people up to space stations in space planes like the absalon, but your not going to be able to do the in-space stuff with chemical propulsion.

They need goals, targets, objectives, call it what you want they need them, I.E developing materially usefull space-based propulsion and support systems for large-scale development and exploitation of our local space. Exploitation of nearby asteroids and other space resources, colonization of other planets, development of space structures, a solar array orbiting the sun capable of collecting and transmitting energy equivelant to that which hits the planet every day. Etc..etc.. Clear goals with deadlines.


#15

Any of you guys do Astrophotography?


#16

You need to position it at a level where the emissions from the sun, and gravity are roughly at equilibrium, possibly using expandable sails to increase and decrease catchment area on the fly as well as steer and propel the station, and/or probably some means of electrical or nuclear propulsions (which would need to be refueled).

You would probably need to watch out for solar flares as well, so it is very important you can move it, and probably the rear should be a special shield that can be rotated, to increase survival chances incase of a flare!

They can't make a structure that is solid, the actual dyson sphere proposals are a collection of little solar receivers, primarily designed to harvest the output of a star (not necessarily all of it, but that is a possibility. and turn it into something materially useful.


#17

It may just be my cyncialism, but it could be the giant reactors of some advanced, possibly intergalactic spacefaring civilization, that could at anytime inadvertently exterminate us like the cosmic ants that we are? And if so what on earth would they be using all that energy to do? Or is it just a naturally occurring phenomena, and if so how do we harvest the energy of this phenomena and is anyone else harvesting the energy?

Also black hole minning, why isn't it a thing, those things have so much mass in them, imagine what we could do with all that matter!


#18

how bout a ring with a dyson sphere element to capture the  sun's energy.


#19

how do you purpose we overcome the gravity well?


#20

goes without saying, i wish i had the equipment and lived far away enough from sources of light pollution.