The interstellar-matter tag has no wiki summary.
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1answer
200 views
How vacuous is intergalactic space?
You often hear intergalactic space is an example for a very good vacuum. But how vacuos is space between galaxy clusters and inside a huge void structure? Are there papers quoting a ...
8
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1answer
67 views
Voyager 1 cosmic ray strips
In the last months Voyager 1 has experienced a dramatic drop in the cosmic ray radiation, which was been exceptionally uniform for the last 10 years, except for the past july 28 and august 14 events, ...
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2answers
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relativistic spaceship, CMB radiation and thermodynamics
Scenario: a spaceship is travelling at a high fraction of $c$. The interstellar gas and CMB radiation has blueshifted significantly and we are facing a possible melting of the front radiation shield!
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3
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3answers
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What's in my box?
Let's say that I have a box which is 100% empty.
I fly into the vacuum of space, open the box and close it after a certain time.
Then I go back to earth and my question is..
What's in my box? ...
2
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1answer
64 views
What is the best evidence/theory about the first generation of stars
In particular, during what range of years after the Big Bang did the stars form? What is the expected range of masses of these stars and what is the expected lifetime before they supernova? I assume ...
2
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2answers
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What are some molecules stable in outer space that are unstable under terrestrial conditions?
What are some molecules stable in outer space that are unstable under terrestrial conditions?
So there are many molecules that violently react on Earth because they're too charged, have unfilled ...
1
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1answer
94 views
What star processes throw strange matter into space?
My understanding is that strange matter is stable in low pressures or vacuum, but correct me if this is wrong
I'm wondering how likely is to find strange matter in empty space. What physical ...
1
vote
1answer
89 views
On the Existence of Interstellar Meteoroids
A meteoroid in orbit around the Sun has a heliocentric velocity in the vicinity of Earth of about 42.1 km/s. So if a meteoroid has a heliocentric velocity exceeding that, it will have an open ...
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2answers
190 views
Why should space be empty? [duplicate]
Possible Duplicate:
How vacuous is intergalactic space?
The emptiness of space is explained in many articles... But, space does contain some matter due to these possible reasons:
During ...
0
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2answers
44 views
One Particle in a Vacuum
I recently watch a lecture by Neil Tyson where he said the closest thing we have to a vacuum is interstellar space. I believe he said there will be one atom per 1 cubic meter or something close to ...
