Questions tagged [weather]

Questions regarding atmospheric conditions on either Earth or on other planets.

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2 answers
269 views

Why do sunrise/sunset times (for a given location) vary based on the source of the data?

I've noticed that different reputable weather websites will give different times for sunrise/sunset for the exact same location. I've seen variation by 25 minutes or more, for sunset on the same date ...
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8 votes
1 answer
120 views

Would lightning on planets with noble gas rich atmospheres cause a glow similar to an electric discharge lamp?

I've read about how noble gases in gas tubes emit varying colors of light when electricity is passed through them For a planet with noble gas rich atmospheres (say >20%), would a lightning strike ...
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2 votes
0 answers
39 views

When will Jezero crater on Mars reach its lowest atmospheric pressure and what pressure will that be?

In the first sols of the Mars 2020 mission the local pressure was something above 750 Pa. It has been decaying since then and is now less than 650 Pa, this is what required Ingenuity's rotorblades to ...
7 votes
1 answer
876 views

What are the "weather" (and other) implications of long "days" and short "years" on Mercury?

On earth, it takes a "day" for it to rotate on its axis, and 365 of these days for it to revolve around the sun. On Mercury a "day" that encompasses a rotation represents 59 earth ...
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1 vote
1 answer
53 views

If Jupiter's day length increased from the current 9 hours to 100 hours, would the weather become more or less violent?

Would average windspeeds increase or decrease if day length increased substantially on Jupiter? Is windspeed in Jupiter's atmosphere primarily driven by solar energy differentials between night and ...
26 votes
3 answers
5k views

Is Jupiter's Red Spot "locked in place" or does it move around?

A person could be forgiven when looking at Jupiter's Red Spot storm for concluding that it doesn't move. That it's geologically locked in place. But is it? I know it's a stretch to use the phrase &...
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2 votes
0 answers
62 views

Abundance of penitente ice formations in the solar system

When researching for my question on extraterresitral snow, I learned about a rare snow formation called penitente which seems to be found on various (dwarf) planets, like Earth, Mars, and Pluto. ...
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8 votes
0 answers
117 views

Spatial wind speed distribution on Mars using dune shapes?

As a fan of exometeorology (the study of atmospheres of other planets), I scanned through a whitepaper Measuring Mars Atmospheric Winds from Orbit which says Measurements of Mars atmospheric winds ...
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7 votes
1 answer
252 views

How long do thunderstorms on Venus last?

A while ago, I learned about field of exometeorology (the study of other planets ' atmospheres) which fascinates me. In particular, I read about thunderstorms on Venus, e.g. about the results from ESA'...
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2 votes
3 answers
105 views

Is there any scientific correlation between cold nights and star-lit skies?

I've many times heard expressions such "cold, starry nights". It's apparently poetic to describe star-lit night skies as being "cold". Is this based on reality in some way? Is ...
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5 votes
1 answer
212 views

Why are only the poles of Mars frozen, despite too cold temperatures on lower latitudes?

Actually the entire red planet is very cold, cold enough for ice and frost to form not only on the poles. Temperature rises above 0 deg Celsius in summer only. Why then are just the poles frozen, and ...
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5 votes
2 answers
403 views

What if a global killer hit Mars?

Compared to the effects an impact of a global killer would have on Earth, what if such an asteroid, with a diameter around 7 miles (11.2 km), impacted the red planet with its different atmosphere, ...
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4 votes
1 answer
226 views

What causes the strong winds on Uranus?

I was just looking up something about Uranus on Google, and read a line I had read many times before - "The strong winds of Uranus...". So, short and easy - "What causes the strong ...
24 votes
3 answers
4k views

Are there lightning bolts on Mars?

Although the Martian atmosphere is thin, there are many atmospheric phenomena that occur on Mars: storms, dust devils, (carbon dioxide) snow,... Some storms even stir up the atmosphere of the entire ...
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3 votes
1 answer
149 views

Is or might there be lightning on Io?

As far as we know, Jupiter's moon Io has the most volcanic activity of any known celestial body. It has the most volcanoes that are active and they're erupting frequently. On Earth (the third planet ...
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6 votes
1 answer
1k views

What weather is present in Jupiter's Great Red Spot?

What weather is present in Jupiter's Great Red Spot? Is it raining? Is it snowing? There is definitely a hurricane a-blowing :-). I know it is very cold, has extremely high winds and clouds of an ...
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3 votes
1 answer
224 views

Any information on the salt content of Mars' atmospheric dust?

Answers to and comments on How to drink water on Mars? suggest that one would not want to drink melted water ice obtained from exposed surface deposits near the poles because it may contain various ...
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3 votes
1 answer
772 views

Would drinking melted ice water from Mars taste like sparkling water?

Does water on Mars form from the atmosphere as ice free from salt? Does water desalinize through the evaporation and transpiration? When the fresh top ice is placed in a container then pressurized to ...
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0 votes
1 answer
146 views

Why is the opening in the Anglo-Australian Telescope's dome so small?

Many older or "classic" telescope domes have a horizon-to-zenith opening in the dome, and this helps speed up the thermal equilibration between the inside and outside air, decreasing turbulence and ...
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2 votes
1 answer
123 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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5 votes
1 answer
124 views

Impact of Atmospheric Water vapour on Optical Observations

I would like to ask; how does Water Vapour in the atmosphere interfere with astronomical observations? Is it in the same manner as Carbon dioxide? What brought this to mind is the following: A ...
2 votes
1 answer
82 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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7 votes
1 answer
514 views

How much do starlight and artificial light illuminate the Moon?

The Moon receives most of its light from the Sun, either directly through sunlight or indirectly through Earthshine. However, there are many other dimmer sources of illumination. Starlight. This is ...
1 vote
1 answer
278 views

Best locations for large telescopes at high northern latitudes

Large optical telescopes want to be located at high altitude (get above as much of the atmosphere as possible). I get the impression that there is also a preference for low latitude (see as much of ...
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25 votes
3 answers
2k views

Terrestrial Exoplanet Skies – I've Built a Visual Sky Chart. Is it Accurate?

I'm an artist (and science enthusiast) and I've been trying to find a comprehensive resource that would help me clearly identify likely sky colors (as perceived by human vision) for exoplanets that ...
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10 votes
2 answers
963 views

Why is there no hurricane on the Sun?

I was reading about gigantic storms on giant gas planets, the great red spot on Jupiter and hexagon on Saturn to name a few, how about our Sun which is consist of plasma(hot gas which have some of ...
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1 vote
1 answer
43 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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2 votes
1 answer
151 views

What does "Active Weather Patterns" mean?

I just read that Cassini discovered titan had "active Weather patterns". What does that mean?
3 votes
1 answer
114 views

What mechanisms limit the top speed of high altitude winds on Venus?

According to http://www.universetoday.com/36816/winds-on-venus/, the high altitude winds on Venus travel at about 100 m/s. I don't think frictional resistance is really what's limiting the speed of ...
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6 votes
2 answers
1k views

Is axial tilt critical for life?

According to this explanation at the Georgia State University website, Axis Tilt is Critical for Life . . . The Earth's spin axis is tilted 23.5° with respect to the ecliptic, giving ...
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5 votes
1 answer
467 views

What makes a really good observatory site, besides altitude?

Let's limit this to optical telescopes. I understand that the higher you are, the less atmosphere is above you to get in the way of observations. From reading around, there seem to be a few more but ...
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9 votes
2 answers
1k views

Why does this graph for sunlight intensity on land has a steeper slope during sunrise as compared to sunset?

I got this image while checking weather data for a city in North India using Mathematica's Wolfram Alpha query I noticed one feature in the graph which i could not explain . Why does the encircled ...
19 votes
1 answer
1k views

Is Earth's orbital eccentricity enough to cause even minor seasons, without axial tilt?

I was reading the answers to this question about an exoplanet having seasons without axial tilt, and several responders mention that orbital eccentricity could cause a similar effect, but that the ...
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14 votes
4 answers
3k views

Would an exoplanet without axial tilt have no seasons?

Would an Earth analog exoplanet which rotates around a solar analog, but without axial tilt, have no seasons? Would it be similar to how Los Angeles does not have very noticeable seasons compared to ...
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2 votes
2 answers
395 views

What is the temperature of outerspace?

I want to know whether the temperature in Outer space is higher than earth's or cold.Is the temperature in outer space vary as it does on earth?
18 votes
4 answers
1k views

What is the most extreme weather found on another planet?

On Venus, there is really inhospitable weather, as well as within the gas giants in our solar system. Are there examples of even more extreme weather on planets found in other solar systems than ours?
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