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Questions tagged [atmosphere]

Questions regarding an envelope of gasses surrounding a celestial body held in place by the body's gravity.

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11
votes
1answer
413 views

Do atmospheric tides have any impact on orbiting satellites or rocket launches?

Wikipedia has an article on atmospheric tides but it is mostly earth based considerations. I was wondering if they have any impact on satellites or rocket launches? We know that satellites in Low ...
3
votes
1answer
2k views

What are the odds of finding a lifeless planet with breathable air?

As I understand it, our current breathable atmosphere on Earth is the result of early lifeforms transforming huge amounts of CO2 into O2. Before early life, even Earth's atmosphere wasn't livable for ...
5
votes
2answers
836 views

How do we measure the atmospheres of Solar system planets?

How much is it possible to measure from Earth and how accurately without sending probes to the planets? I am curious about how atmospheric boundary (altitude), atmospheric pressure, scale height were ...
4
votes
1answer
2k views

Is it possible to bring “nothing” back from space?

I think the ultimate souvenir would be not a moon rock or a martian, but space "nothing", but I wonder if this is physically possible... Can an astronaut go out to space with an open container, close ...
8
votes
1answer
944 views

Can you have a rainbow on any bodies in the solar system besides Earth?

We know from Flying on dense atmosphere planets & moons that many bodies in our solar system have sufficient atmosphere for at least the concept of flying to be considered. What about the ...
14
votes
5answers
2k views

What level of oxygen in a planetary atmosphere would be indicative of life?

Astronomical spectroscopy can be used to determine the chemical composition of far away bodies. In the related question Can we detect atmosphere on exoplanets? we learned that even now we are studying ...
2
votes
1answer
245 views

Minimum size meteoroids for meteorites on Earth, Mars, and the Moon?

What approximate size range, considering the different construction and composition, must meteoroids be to become meteorites on Earth, Mars, and the Moon?
8
votes
1answer
426 views

Can we detect atmosphere on exoplanets?

We are finding new planets in other solar systems all the time. Some of them are in a habitable zone of their sun. Are we able to detect the atmosphere of any exoplanet? Is there any atmospheric ...
8
votes
4answers
2k views

What is the barometric formula for a gas giant?

The barometric formula describes the atmospheric pressure depending on height and a host of other things. This formula assumes a constant gravitational acceleration over the whole height of the gas ...
8
votes
1answer
612 views

Is there a profile of atmospheric pressure and gravity of Uranus?

One of the intriguing facts about Uranus is that somewhere within the gravity is about 0.9g. Now, if one wants to daydream about living on Uranus in slightly chilly balloons, it would be interesting ...
5
votes
1answer
356 views

Could increased atmospheric pressure act as a countermeasure for effects of microgravity?

Are there any possibilities to counter the negative effects of low or micro gravity by increasing the atmospheric pressure?
8
votes
2answers
2k views

Depressurization of a habitat on Mars

Wikipedia lists the atmospheric pressure of Mars to be about 600 pascals, or just 0.6% of Earth's atmosphere. I'm wondering, can anyone shed any light on what that means, in practical terms? ...
6
votes
1answer
162 views

How would critical refractivity of radio waves on Venus be overcome?

Rereading my answer here and in particular, rereading the article Optical and Radio Refraction on Venus (Stratton, 1968) it is my understanding that there is significant refraction of radio waves, as ...
12
votes
1answer
1k views

How long will it be light on Venus at night?

The atmosphere of Earth bends light such that there is still light after the sun goes down for a period of time. How would such effects appear on Venus, given the thicker atmosphere?
10
votes
1answer
587 views

Will Pluto's atmosphere collapse prior to New Horizon's visiting it?

It is thought that Pluto's atmosphere will freeze as it moves further from the Sun. We know that Pluto was it's closest to the Sun in the 1990's. Is it known if the atmosphere will freeze prior to New ...
2
votes
0answers
1k views

Approximately how much water does Earth acquire/lose annually from extra-terrestrial sources? [closed]

The approximate volume of water on Earth is 1.338 Billion cu.km Earth regularly intercepts a number of space objects as meteors During the course of their descent through the atmosphere some burn ...