Questions tagged [atmosphere]

Questions regarding a layer of gasses surrounding a celestial object.

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1answer
77 views

What are the characteristics of solid carbon dioxide on the Martian poles?

When carbon dioxide forms on Mars is it like ice or snow? How dense is newly formed solid carbon dioxide? Would more carbon dioxide form inside a pit vs a flat plain? How thick or deep does solid ...
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1answer
101 views

Scattered Intensity of Light vs Angles of Incidence and Emission

So I just derived an expression for the scattered intensity of light from an atmosphere with ideal isotopic scattering: $I/F=\frac{cos(i)}{4(cos(e)+cos(i))}$, where $I$ is intensity, $F$ is flux, $i$ ...
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1answer
103 views

How long can afterglow last after a fireball?

I was watching the YouTube video Perseid Meteor Shower - Mojave Desert, California which looks East before sunrise, presumably in mid-August of 2016. I've made a GIF of a few seconds near the ...
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1answer
47 views

Can IR sensitive cameras read signals from Venus's surface emissions?

This question got me thinking about this. I know that we measure the Earth's surface temperature by satellite (perhaps somewhat inaccurately, but it's done all the same). Using Venus as an ...
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1answer
193 views

Can you assume atmosphere height for the purpose of surface pressure calculation?

Given that by definition of scale height an atmosphere thins by a factor of 1/e^x where x is elevation in terms of scale height multiples (See the table here: Definition of Scale Height), can we ...
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1answer
90 views

Why are cirrus clouds more common on Mars?

Mars water ice clouds are often associated with regional- to-global circulation and saturation conditions, as opposed to local convective overturning, and so typically exhibit cirrus rather than ...
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1answer
114 views

Effect of Hot/Warm Jupiter atmosphere loss on other planets

Let us suppose a solar system with a Hot/Warm Jupiter HJ (with a semi-major axis somewhere from 0.5 AU to 0.0001 AU) and an Earth-Like planet EL in it (with a semi-major axis of about 1 AU). Let their ...
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0answers
31 views

Is the atmosphere of neutron star solid, liquid or gaseous state? [duplicate]

Neutron star has a thin layer of atmosphere consist mostly of hydrogen and helium and is about less than a metre thick on average, but what wasn't stated in many articles I read is the state of matter ...
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55 views

Is thermal disintegration of meteorites variable with lattitude?

If meteorites and bolides are aligned to the solar system, then do they have twice as much atmosphere to go through at high latitudes? Wouldn't we expect a higher percentage of metal meteorites ...
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1answer
1k views

Effect of the absence of atmospheric refraction to sun rise and sunset times

What is the effect of absence of atmospheric refraction on sin rise and sunset time? Is it will be delayed or earlier for sunrise and sunset, and why? Thank you:)
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3answers
299 views

Could the Moon sit on the Earth?

Let say that the Earth's Moon was knocked out of orbit and landed on the Earth with some damage but not world ending. Would Earth's atmosphere envelop to include the Moon? Would the moon sink into the ...
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1answer
2k views

Does the Sun have any atmosphere?

Does the Sun have any atmosphere of its own? Is it just like the atmospheres that the planets have.
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2answers
213 views

Why do rocks on other solar system bodies that have an atmosphere seem to be flat?

Images taken by landers on Titan and Venus and Mars show landscapes where rocks, to me at least, are surprisingly flat. Being used to walking around in forests with roundish meter sized boulders, I'd ...
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2answers
122 views

Why is it that night has a almost a bluish tint to it instead of red?

From my understanding/been told, the color red has the ability to travel the farthest in our atmosphere, being the reason why we have red sunsets and such. But with this in mind, why is it that at ...
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2answers
98 views

Can a planet's gravity rip out its moon's atmosphere?

We all know that solar flares can rip a planet's atmosphere if the magnetic field is weak.Solar flares travel at tremendous speed so when they hit the gas molecules of a atmosphere the molecules are ...
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1answer
184 views

How do astronomers detect gases that are in the atmosphere of exoplanets?

Exoplanets are planets that are located outside our solar system - whether that be orbiting a star or drifting past one. Now, the closest star to us is Alpha Centauri which is just over four light-...
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3answers
163 views

Could a Jovian or Saturnian moon keep its atmosphere if the system was within the habitable zone?

Currently the atmosphere of Titan is 1.5x thicker than Earth's atmosphere, but it's also much much colder. It's been said that an astronomical body can keep it's atmosphere if the escape velocity is ...
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2answers
109 views

What if the atmosphere of Titan were like the one on Venus?

The current mean temperature in Titan is −180 ºC (93 K), the same as in Saturn. But I was wondering what would be the case if the atmosphere of Titan would be like the Venus atmosphere, whose ...
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1answer
247 views

Is there a comfortable part of Venus's upper atmosphere?

I know the surface of Venus is very hot, but that it gets cooler the higher you go in the atmosphere. I have heard that there is a section in the atmosphere of Venus that might be somewhat habitable ...
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2answers
187 views

If gaseous planets have solid core, can they theoretically be considered as rocky planets?

I read that gaseous planets such as Jupiter and Saturn, have a solid core deep inside. So, I wondered whats the difference between them and rocky planets apart from the fact that they have - what can ...
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2answers
132 views

Are exoplanets at dwarf stars less likely to have super-rotating atmospheres or asynchronous tidal locking?

Dwarf stars have terrestrial sized planets orbiting in habitable zones very close to them. These exoplanets are often said to be tidally locked to their star, like the Moon is to Earth, and that they ...
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1answer
164 views

Does Jupiter lose some atmosphere at all?

I've hear of something like this: "All planets lose their atmospheres eventually and they become a barren rock if given enough time." There are three types of atmospheric loss ways: Jeans Escape: ...
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1answer
56 views

How thick or deep does solid carbon dioxide accumulate on Mars?

On Mars is there an area in which all the $CO_2$ evaporates exposing dirt near the pole? How deep can solid $CO_2$ accumulate during winter in that area during the Martian Winter? https://space....
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1answer
241 views

How much time does it take for a meteor (shooting star) to touch the ground after its combustion? [closed]

I know that meteors that We see as shooting stars travel tens of thousands of kilometers per hour and are tiny as a grain of sand, but after hitting the atmosphere and burn I suppose that its ashes ...
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1answer
107 views

If a rocky world is large enough (not a gas or ice giant) can it have helium from the primordial disk in its atmosphere?

When planets are formed do only gas and ice giants accrete hydrogen and helium? Does this accretion have to be beyond the "snow line"? In other words, would all hydrogen or helium in the atmosphere ...
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1answer
140 views

Why doesn't the Moonrise appear red when viewed from orbit?

After searching through many videos, I finally found one that shows, from the perspective of low earth orbit, the Moon transiting the horizon. It is actually a Moonset, but it shouldn't make a ...
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1answer
61 views

What is the boundary in the atmosphere seen in this video?

This video, which shows time-lapse views of Earth from the ISS, consistently shows some sort of hard boundary in the atmosphere, below which there seems to be significant reflection from sunlight and/...
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2answers
44 views

What is the horizontal distance needed to observe an object just as badly as if it where in space at the zenith?

When I see an object in space (let's say the ISS) above my head, my line of sight traverses ~$100\; km$ of atmosphere. The vast majority of the extinction, absorption and turbulence happens closer to ...
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1answer
115 views

Venusian polar surface temperatures

I've stumbled across several articles about how the Venusian polar high atmosphere is really cold. What these articles appear to fail to specify is what the surface temperatures of the poles are. I am ...
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0answers
32 views

Ladakh India where the moon (Ramadan moon) is sighted but not in rest of India [duplicate]

Today 22 May 2020 around 3 p.m Ladakh India sighted new moon(Ramadan moon) but not in rest of India.I read many articles acc. To them it is not visible today, then how it was seen from Ladakh... .
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55 views

What would happen to the atmosphere of a rogue jovian planet?

Let's say we have a gas giant composed primarily of hydrogen and hydrogen-rich molecules that is ejected from its star system. As this planet embarks on its potentially infinite journey out into the ...
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0answers
53 views

Public Data Set on Atmospheric Absorbtion / Extinction

Is there a publicly available data set for mean atmospheric absorption / extinction? I would like to be able to process and plot a graph similar to this image from NASA on wiki commons. The HITRAN ...
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1answer
273 views

Is the moon inside earth’s atmosphere? If so, what are the consequences?

Recently, a paper was published claiming that the Earth’s atmosphere extends far beyond the Moon. This has been reported on by a number of news sources and websites, including the ESA, Business ...
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1answer
70 views

Solution for counting atmospheric layers of planets according to relational data [closed]

This math states, that by multiplying the gravitational pull (we assume square of density of the planet), by its inclination (being how high and out it goes) and subtracting that loop from the ...
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1answer
151 views

The consequences and the mechanisms of a shift of the Earth away from the sun

First premise: I have already made this question in the worldbuilding section, but since it is a very specific question many have recommended me to write in the astronomy section so here we are. ...
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2answers
296 views

Adiabatic versus convection

I am reading about the interior temperature structure of Jupiter. It says in various texts that there are regions in Jupiter's atmosphere which are well-approximated by a dry adiabatic lapse rate. ...
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2answers
180 views

Is Titan Better or Mars? [closed]

Isn't Titan better to colonize than Mars? It has a thick atmosphere which is made up of nitrogen like our planet's. It doesn't have a magnetic field, but it does get a type of protection from Saturn. ...
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1answer
27 views

What are reliable resources for weather and all other atmospheric obstructions?

Everyone knows you need clear skies to see what the stars or the Sun is doing. Weather is not too particularly hard to determine. There are many resources out there that will tell us the weather in ...
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1answer
96 views

When and where are we exposed to most cosmic radiation?

I understand the mechanical dynamics of being faced away from the Sun at night, having a lower altitude, not being in the weak points at the poles in the atmosphere, being in a valley and others ...
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1answer
29 views

What are the real conditions for the creation of an atmosphere/loss of an existing atmosphere?

Overview: Taking a planet Ganymede for example (moon, technically I suppose). Ganymede is huge (well, in contrast to other bodies) and I've noticed a pattern between larger bodies and atmospheres. ...
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1answer
99 views

How accurate are rederings of something entering Earth's atmosphere?

Supposedly how accurate is it when you see a movies showing something entering Earth's atmosphere traveling 1 mile to 10 miles an hour or barely at all but skinning the atmosphere they show it heating ...
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1answer
156 views

Around what apparent magnitude can the naked eye observe an object during full moon

For a very rough guideline using healthy/corrected eyes adjusted to the dark, around how bright should an object be to expect it to be visible?
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18 views

X-rays, Solar wind and Sun's corona

I was reading that Solar corona emits the solar wind however also X-rays. What is the difference during the creation of these effects and impacts on our atmosphere? Thank you!
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0answers
81 views

Does space not make sound, or can we just not hear it? [duplicate]

This is a question regarding sound waves and space. I know that sound waves must travel through a medium "air", enter our brains, and then we can decipher what exactly the sound is. But in space, ...
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1answer
78 views

Where will the atmosphere of our Earth go if our sun blows it away completely?

What will happen?Will our atmosphere head to the next gravity dominant body?Will our moon hold a part of our atmosphere or is too weak to hold it?Where all those gases are supposed to go?
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5answers
822 views

Vacuum of space [closed]

Firstly I’m genuinely interesting in a working explanation for this question. It is for this reason that I am editing the question to fine tune the question. In essense the question has remained the ...
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1answer
96 views

Pluto is fuzed to all the asteroids, comets, other minor planets, etc. Would it be big enough to hold an atmosphere without forming a tail? [closed]

Pluto is fuzed to all the asteroids, comets, other minor planets, etc. Would it be big enough to hold an atmosphere without forming a tail? All minor planets, asteroids, comets, etc that aren't ...
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1answer
149 views

Looking at ourselves with a powerful telescope?

Could a small curved mirror and/or lens in Earth's orbit be aimed at a different hemisphere from where you are be be viewed with a powerful telescope to see the ground through the mirror? Would a more ...
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2answers
348 views

Why don't these Clouds show no depth perception in correspondence to the Sun [closed]

The pictures show exactly what my naked eye visualized.What is the cause of this?
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1answer
340 views

Is it possible that Fly a Boeing 777 plane on Moon? [closed]

i always wondered that Is it possible that Fly a Boeing 777 Air Craft on Moon? if cannot how this moon lander's (Apollo) landing in Moon taking off from the moon?

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