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34 votes
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Is Mars more at risk than Earth for asteroid collisions?

There are three factors which contribute to the difference in “apparent crateredness” between Earth and Mars. By far the most significant is ongoing erosion from weather. In Mars’ thin atmosphere, a ...
Russell Borogove's user avatar
25 votes

Is Mars more at risk than Earth for asteroid collisions?

This report shows that Mars is hit over 200 times a year by meteorites big and/or fast enough to leave a crater of typically 12.8 feet diameter. Earth strikes of this size are thankfully much rarer, ...
Boodysaspie's user avatar
21 votes

Can a meteor shower have a interval greater than 1 year?

This is really more of a question for Astronomy.SE, in general this doesn't happen, but circumstances can work out that it does, see the updated last few paragraphs. Every meteor shower with an ...
notovny's user avatar
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16 votes
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How can a meteor gain energy in an encounter with the Earth even though these answers say it can't?

I am Patrick Shober (the lead author of the study). Thanks so much for checking it out! If you check out Figure 10 in the paper, I have plotted the specific angular momentum in the Sun-centered frame. ...
Patrick's user avatar
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8 votes
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Meteor color hints at chemistry

Absolutely, it's the same as heating up metals with a blowtorch. The colour of the flame tells you what is present. Wikipedia actually has a handy list giving an indication of the significant elements ...
Rory Alsop's user avatar
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4 votes
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Did Mars Express get hit by a "Meteor hurricane"? (2014 October 19, comet C/2013 A1) Was it observed at all?

Crismani et al (2018). "The Impact of Comet Siding Spring’s Meteors on the Martian Atmosphere and Ionosphere" Journal of Geophysical Research: Planets. ... we show this shower lasted less ...
Andrew is gone's user avatar
4 votes
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How much do on-demand, artificial meteor showers cost these days?

They are not yet a thing, but are still being worked on. The system will launch on the Electron rocket. The cost isn't known, but it will be launched on an Electron rocket, costing \$6 million, and ...
PearsonArtPhoto's user avatar
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4 votes
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How to protect Mars/Moon mission crews against meteors?

The technologies are probably not going to be much different from the ones existing right now. The ISS doesn't really benefit that much from atmospheric shielding in its current orbit, so they have to ...
Gabriel Sanchez's user avatar
4 votes
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Why are space probes and satellites not destroyed by meteor showers such as the Perseid?

Space is big. Really big. You just won't believe how vastly, hugely, mind-bogglingly big it is. I mean, you may think it's a long way down the road to the chemist, but that's just peanuts to space, ...
Mark's user avatar
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3 votes
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What is used to monitor objects burning up in the atmosphere on descent?

There's a "Global Infrasound Network" that monitors for nuclear explosions. If a reentry is big enough, I expect they'll "hear" it. It might have to be pretty big, perhaps larger ...
Bob Jacobsen's user avatar
  • 12.7k
2 votes

How can a meteor gain energy in an encounter with the Earth even though these answers say it can't?

well, its called a gravity assist. the asteroid took a small amount of earth's velocity and used it to speed up. this is different than skipping off a atmosphere think about skipping a rock on a lake, ...
Topcode's user avatar
  • 893
2 votes

What is the temperature of the atmosphere at the height where meteors burn up and does that temperature significantly help cause the burning up?

Let's assume the following height for meteors: Some meteors, such as the Perseids in August, burn up in the atmosphere at about 60 miles (100 km) above Earth’s surface. Other meteors, such as the ...
samcarter_is_at_texnique.fr's user avatar
1 vote

How different would a comet impact be vs. an asteroid impact?

An iron meteor surviving the trip through the atmosphere would loose a huge amount of kinetic energy onto its impact point resulting in well ... a crater. Effects are much more localized. An icey ...
Robert DiGiovanni's user avatar
1 vote

What is the temperature of the atmosphere at the height where meteors burn up and does that temperature significantly help cause the burning up?

The meteors that look like shooting stars burn up in the mesosphere (31-53 miles / 50-86 km above sea level). At the mesopause, the upper boundary of the mesosphere, the temperature is the coldest on/...
Giovanni's user avatar
  • 389
1 vote
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What are the "NASA research assets" at Thule that were not recently destroyed by a meteor?

Okay I'll take the @Hobbes challenge. Let's start with this short NASA video of (the late) Dr. Piers Sellers, OBE, climate scientist and NASA astronaut (STS-112, STS-121, STS-132): ...
uhoh's user avatar
  • 149k
1 vote

What is used to monitor objects burning up in the atmosphere on descent?

Several satellite radar tracking stations are being used to track the doomed station. This .png is updated every few minutes by The Aerospace Corporation. In the lower left a list of tracking radars ...
Organic Marble's user avatar

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