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30 votes
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How long between the moment a meteor is first visible and the moment a meteorite hits the ground?

I'm a researcher at Curtin University working on the Desert Fireball Network. The DFN is the largest fireball observation network in the world, and our primary goal is to recover meteorites with ...
Patrick's user avatar
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29 votes

Hot meteorite lands on bed

When a rock is in space, it may be quite cold. A rock that is in space in the vicinity of the Earth and heated (on one side) by the sun would reach an equilibrium of about 10° C (depending on how ...
James K's user avatar
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29 votes
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Safest Place on Earth from Falling Meteorites

Robertson et al. (2021) (note the erratum) provide a very comprehensive answer to your question. Surprisingly (to me) the asteroidal flux (impacts per unit area) is slightly higher at the poles (by 8%)...
ProfRob's user avatar
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21 votes
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Which kind of celestial body killed dinosaurs?

Definitions: A meteoroid is a celestial object larger than an grain of dust and smaller than 1 meter in diameter. An asteroid is a celestial object larger than 1 meter in diameter. A meteor is a ...
M. A. Golding's user avatar
20 votes
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If two asteroids will collide, how can we call it?

They are both called asteroids. There is neither logic, nor science, nor even a convention of calling either body a "meteor", since meteors are strictly atmospheric phenomena, that occur ...
James K's user avatar
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19 votes
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Meteor traveling through atmosphere without hitting Earth

yes it is possible,they are called Earth grazers or Earth-grazing fireball. they are not rare but only few incidents are recorded. for more details read this Wikipedia page https://en.wikipedia.org/...
Sanket Deshpande's user avatar
18 votes
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What is the name of meteoroids which hit Moon, Mars, or pretty much anything that isn’t the Earth?

Oxford English Dictionary is an authoritative source, but it's aimed at the general public. I think no astronomer will frown upon you when you're using the terms meteoroid and meteorite to describe a ...
Glorfindel's user avatar
  • 4,790
18 votes

Has the small meteorite that hit Webb done a lot of damage?

Has the small meteorite that hit Webb done a lot of damage? The TL;DR answer is an emphatic no. Details follow. How seriously must we take this? The TL;DR answer is an emphatic not at all, at least ...
David Hammen's user avatar
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15 votes

Can a crater form inside another crater

Yes, craters can overlap, and they do overlap. The exact theory of the origin of the Moon is still debated, but from the understanding of the Lunar geologic timescale we can see that it's been there, ...
planetmaker's user avatar
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15 votes
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Can a crater form inside another crater

Yes, of course. Lunar surface is filled with overlapping craters. See Vendelinus for example. The relative ages of the craters can be determined by the amount of secondary craters per unit area which ...
Nilay Ghosh's user avatar
  • 4,642
14 votes

Is there a way to tell the difference between earth andesite from Mars

If this is something that you have found (rather than purchased as a meteorite) the chances are very small that it is a meteorite. Even if it is a meteorite, the chances it's a Martian one are even ...
astrosnapper's user avatar
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14 votes

What is the name of meteoroids which hit Moon, Mars, or pretty much anything that isn’t the Earth?

Wikipedia's entry for Heat Shield Rock says: Heat Shield Rock is a basketball-sized iron-nickel meteorite found on Mars by the Mars rover Opportunity in January 2005. The meteorite was formally ...
uhoh's user avatar
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13 votes
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Why didn't all the iron and heavier elements find their way to the center of the accretion disc in the early solar system?

The process of differentiation is how metals like iron and nickel can become separated from less dense substances. It generally occurs in large, partly solid bodies in the early solar system, whose ...
ProfRob's user avatar
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12 votes
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Are there Earth rocks on Mars?

Well if no one is going to answer this I will. The answer is we don't know for sure. We speculate that there should be earth rocks on mars but until we 'see' one and analyze it we will not know for ...
Natsfan's user avatar
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10 votes
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What factors influence the Widmanstätten pattern in iron meteorites?

It’s been a while since I studied this, and meteorites are very much not my field, so I’ll share my current understanding but would welcome corrections from those more informed :-) These meteorites ...
Matthew's user avatar
  • 288
10 votes

Which kind of celestial body killed dinosaurs?

Based on the Wikipedia article: There is broad consensus that the Chicxulub impactor was an asteroid with a carbonaceous chondrite composition, rather than a comet. And it cited a paper which ...
Nilay Ghosh's user avatar
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9 votes
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Are the 2 planets in this image Venus and Saturn? And is this a fireball shooting star in top right of picture?

Yes, Moon, Venus and Saturn. This can be confirmed with (for example) Stellarium. The object you see is a contrail of an airplane. A fireball is a bright meteor, and a shooting star is a less bright ...
James K's user avatar
  • 123k
9 votes

Which kind of celestial body killed dinosaurs?

Your question asks "Which kind of celestial body" Meteorites and Meteors are not celestial bodies. Meteorites are not celestial, they are a type of stone that is sometimes found on Earth. ...
James K's user avatar
  • 123k
8 votes

How can I identify if my stone is meteorite?

Video evidence won't be conclusive. However the odds are stacked against you... Meteorites are rare, far rarer than gold, even rarer than diamonds, (though unlike gold and diamonds they can be found ...
James K's user avatar
  • 123k
7 votes

Did I see a meteorite in daylight? (4.30pm on 11/6/23

This is almost impossible. A meteorite that has entered the atmosphere and survived the "bright" passage through the upper atmosphere will fall to Earth as a stone. In doing so it will lose ...
James K's user avatar
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6 votes
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When the asteroid hit the earth 65 mya did the earth's gravity pull change? By how much?

The gravity of Earth did not change substantially. The strength of gravity on Earth is about 9.8, but varies between 9.76 and 9.83 ms-2(due to Earth not being a perfect sphere) This can be ...
James K's user avatar
  • 123k
6 votes
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Meteor shower from Moon's "debris"

There is a class of meteorites called Lunar Meteorites and several of those have been found on earth. Of course, it doesn't necessarily indicate whether we have actually witnessed a certain lunar ...
Dhruv Saxena's user avatar
6 votes
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2019OK energy at impact

You can use the Purdue 'Impact Earth!' website to estimate the effects of impacts of objects of various size, speed and composition. As detailed in the accompanying documentation, which was published ...
astrosnapper's user avatar
  • 8,357
6 votes
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How many meteorites have been found some place other than Earth? Where is an authoritative list maintained?

Finally, I managed to find such list (and even more): Meteoritical Bulletin. You can search for every location where at least one meteorite was found (including Mars and Moon). You can also choose ...
User123's user avatar
  • 2,879
6 votes
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Why isn't the moon's surface made of mini craters?

Nice question, unfortunately your analoguous experiment is not as analoguous as you might hope. In your comparison image you are using both, not enough impactors, and a too tiny size distribution. ...
planetmaker's user avatar
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6 votes
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Is it possible for a meteorite to start a fire on the ground?

Obviously an asteroid impact can sometimes start fires on the ground. The Tunguska Event in 1908 probably caused fires on the ground. When investigating in 1927: Kulik led a scientific expedition to ...
M. A. Golding's user avatar
6 votes

Which kind of celestial body killed dinosaurs?

Both are correct. Yet talking of a meteoroid (or meteorite once on earth) is not very helpful in this context as that does not say anything about the object other than 'falling from space onto Earth'. ...
planetmaker's user avatar
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5 votes
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Water Ice on Meteorites

It looks to me that you probably have some misunderstanding of the term meteorite. A meteorite is a remnant body which has reached the surface of a major or minor body (a planet, a moon, an asteroid, ...
SergiusPro's user avatar
5 votes
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How frequently are other planets in the Solar system hit by meteorites?

Moon Even though the Moon obviously isn't a planet, it's a good place to start as most of the observations of meteorites hitting other bodies has been focussed on the Moon. NASA runs the Meteoroid ...
Barry Jenakuns's user avatar
5 votes

Are there Earth rocks on Mars?

It is certainly possible for rocks from Earth to be ejected and impact - and survive impact - on Mars. However, without doing specific isotopic analysis to determine the origin, one cannot simply ...
Stuart Robbins's user avatar

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