Questions tagged [interstellar-medium]

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3
votes
1answer
99 views

Would the Voyager probes go backwards affected by the strong interstellar wind beyond Heliosphere?

The Heliosheath is the solar wind piles up as it presses outward against the approaching wind in interstellar space. It seems the balance in pressure between Heliopause and interstellar wind causes ...
6
votes
2answers
182 views

Feasibility of Interstellar Probe Communication

So, I understand that to transmit information across interstellar distances, you need to use a lot of power (or less bandwidth?), something for example a small space probe wouldn't exactly have. If we ...
4
votes
1answer
216 views

Could a molecular cloud be breathable?

Molecular clouds in deep space are fascinating objects. Various organic molecules have been found there (including alcohol, heh heh). So if one of these clouds contained about 20% of oxygen, would it ...
3
votes
1answer
726 views

Using interstellar medium as propellant for ion propulsion

The Bussard Ramjet assumes a huge scoop picking interstellar hydrogen, compressing it into plasma, subjecting to nuclear fusion (harvesting the fusion energy of hydrogen) and ejecting the products of ...
1
vote
3answers
435 views

How would an interstellar probe navigate the pull of gravity from stars and other large objects on the way?

Refer to the ambitious probe sent by Yuri Milner, Stephen Hawking and Mark Zuckerberg to Alpha Centauri: Yuri Milner is spending $100 million on a probe that could travel to Alpha Centauri within ...
3
votes
2answers
676 views

Could unexpectedly high levels of interstellar space debris be the Great Filter?

I've heard (though I can't find the source) that sufficiently large interstellar space debris has the potential to destroy spacecraft, and that there is considerable uncertainty about how much of a ...
5
votes
1answer
680 views

Are Oort clouds of stars rather discrete or connected?

In the article Nomads of the Galaxy (or this video), it is said that there are possibly 100000x more "free planets" (not orbiting a particular star) than stars. If the size distribution of "free ...
19
votes
3answers
7k views

Can we use interstellar hydrogen as a fuel for interstellar travel?

From my understanding, space is not entirely empty. Infact, between the voids of space are molecules or maybe individual atoms of hydrogen just floating around. I understand that gathering massive ...
10
votes
3answers
402 views

Does the Heliopause really exist?

The Voyager 1 recently entered the interstellar space. The Voyager group said that the Voyager 1 has left the Heliosphere and entered the interstellar space. Charge particles and plasma activities ...
15
votes
2answers
3k views

Does the radiation danger in interplanetary space decrease the further you get from the sun?

Does radiation danger increase or decrease as you travel farther from the Sun? I understand that there's a significant radiation hazard to astronauts. Say, traveling from Earth to Mars, due to ...
10
votes
2answers
579 views

Are there enough oxygen molecules in space that they could be compressed into breathable oxygen?

There is stuff floating around in space - everything from asteroids to planets to molecules. I was thinking - would it be possible to harvest stray oxygen molecules, compress them, and get breathable ...