Questions tagged [asteroids]

This is a tag for asteroids, not dwarf planets or any other astronomical object.

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2
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0answers
21 views

Does an asteroid have a Roche Limit?

Let us imagine two meteors, orbiting the other very close. Can one/both rip themselves apart - even when they have much less mass than, say, planets?
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+50

What's the biggest cube you could have before gravity rounded it?

I took this question from Quora because it seems interesting and this community would have some fun with it. I would assume that one would use the modulus formulas for force to counteract the gravity, ...
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1answer
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What effect would this most recent asteroid fly-by have had if it impacted?

According to this article, an asteroid came dangerously close to the Earth. The asteroid was roughly the size of a football field. What would the result of this asteroid be if it had impacted square ...
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Asteroid Deflection

I am looking for various methods to deflect large asteroids.Apart from the direct kinetic impact(i.e.exchange of momentum), what are the other ways for the asteroid deflection?
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2answers
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Is it possible to use sound waves to move asteroids?

Does it seem feasible to use sound waves to deflect an inbound asteroid? Would it matter what frequency the sound waves are? Would it matter what the size or mass of the asteroid is?
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How to estimate the mass of an incoming asteroid?

A second galactic visitor has just been observed: see this link. For a mass which is small enough to have no noticable effect on other masses, is there any other way to infer the mass? Its own motion ...
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1answer
24 views

A question about the physics of asteroid deflection [on hold]

A lot of scientists considered the problem of asteroid deflection.  So here is a question about this. Kinetic weapons are a well defined/studied  notion: A few words about the Orion project : ...
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1answer
83 views

Asteroid Theory of Dinosaur Extinction [closed]

Have proponents of the Chicxulub dinosaur extinction theory wildly exaggerated the effect of asteroid impact in order to validate their theory? For example,the world-wide forest fire claim doesn't ...
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1answer
71 views

Can we build a superconductor on the Moon and beam energy where needed? [closed]

Should we not build a superconductor facility on the moon ? We find a spot where the rays of the sun don’t provide heat. This should enable a superconductivity facility to operate due to the low ...
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Minimum size of an asteroid to actually impact earth

From what I understand, an object entering the atmosphere will start to burn up from the tremendous resistance of the atmosphere. Presumably, for asteroids under a certain size, they will burn up ...
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Observed Data for Asteroid Lightcurve

I am looking to find out more about writing statistical analysis programs in python for astronomy problems and was recommended that I could analyse asteroid light curves for an introduction into the ...
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1answer
110 views

Why is ʻOumuamua traveling so slowly?

Imagine a space rock that starts at rest at the Lagrange point between the sun and our nearest stellar neighbor, Alpha Centauri. That would put it at about 2 light years away from the sun. Now, it ...
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Is there a term for the study of asteroids?

I'm trying to find the name for the academic specialty of studying asteroids, but I can't seem to find any. For example, there is a distinct wikipedia page for "Planet" vs "Planetary science". Is ...
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Can asteroids fall on earth and hit the surface at 90 degree angle?

I always Saw in movies ,cartoons every where that asteroids hit the earth at an angle (not 90 degree). But Why ? ...
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1answer
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Suitability of FLUKA for Simulation of Backscattered Radiation off an Asteroid

This one's pretty simple. I'm looking at trying to simulate the backscattered radiation coming off of a S-type asteroid shape model due to impinging GCRs and solar particles. Ideally my simulation ...
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2answers
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How does the central peak in moon craters form?

The central peak in many of the moon's large craters are visible with a telescope and they seem a little odd to me. Can someone explain how they form.
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1answer
28 views

Can the collision of asteroids form another moon?

In the lifetime of the earth, is it possible for sufficient collisions to occur in the asteroid belt to form a prototype moon?
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1answer
78 views

Is it possible to create Dyson sphere or ring using asteroid belt?

With the recent advent of Starman over to asteroid belt, although he does have enough tools to achieve the purpose :) Do the asteroid belt have enough raw material to build a huge ring of solar panel ...
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1answer
236 views

How fast would the destruction caused by an asteroid impact travel on earth?

I know it depends on mass and speed, so take for example the asteroid that caused dinosaurs mass extinction. I read that it was 6km (10 miles) wide. How fast did the destruction - trees, rocks, dirt, ...
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2answers
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Constant thrusting force vs explosions for re-directing a giant asteroid's course [closed]

Background: SPOILERS In episode 11 of the Inuyashiki anime, Mr. Inuyashiki, a super-powerful 'robot' made from the technology of an advanced alien race, flies to space in order to stop a "giant" (no ...
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3answers
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What if an asteroid the size of the moon hits earth?

Would we all perish due to excessive heat? Or would that be limited to the area near the impact while the people on the rest of the earth would die from other phenomena such as mega earthquakes, ...
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1answer
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When using radar in space to find asteroids is it helpful to know the distance? Or do you just need the direction?

Couldn't they just send out the largest sounding pulse in a given direction that they could safely generate, and if there is anything in that direction no matter if it's by Jupiter or pluto as long as ...
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How do the terms comet, asteroid, meteoroid, meteor and meteorite differ?

These terms are frequently used interchangeably by the uninitiated to mean approximately a “space rock”. In practical terms, how do their meanings differ?
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1answer
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Acceleration due to gravity everwhere on the equator of a spherical ASTEROID of [closed]

IT IS FROM PRACTICE BOOK OF OLYMPIAD.MY TEACHERS TOLD BUT IT WAS SOME 4 INCH TWO EQUATION AND TOLD ME TO SOLVE.
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1answer
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Hypothetical Question: Would a person be able to stop an asteroid from colliding with earth? [closed]

This is somewhat of a shower thought. Let's say there is a person with the same capabilities as superman. Would that person actually be able to stop an Asteroid from hitting earth? I can only image ...
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2answers
275 views

Asteroid orientation possible?

I’m writing a SF story with a question about an element of my plot. I have a Manhattan-sized NiFe asteroid, with little or no spin, in orbit at 2.5 astronomical units from the Sun. Would it be ...
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What is the current status of Pluto?

Pluto has been designated a planet in our solar system for years (ever since it was discovered in the last century), but in 2006 it was demoted. What caused this decision? And is there a chance that ...
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1answer
420 views

Would rotating a large asteroid be a structurally viable way generate 0.3 Earth gravity?

This question is based off something I have seen in science fiction. The TV series The Expanse is known for having realistic physics when it comes to artificial gravity (i.e. no Star Trek gravity ...
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1answer
631 views

What is the fate of the asteroid belt?

From what I understand the asteroid belt never formed into a planet because Jupiter threw off the gravity of all the small objects and they never could gather to form a planet. As described here: Why ...
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How are gravity tractors possible?

I've heard about how NASA is planning to redirect asteroids by having a satellite tug on it gravitationally using a large enough bolder, but how is that possible? I thought that changing the ...
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2answers
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What Sensor Replaces CCD for Measurement of Astetroids in the Near Infrared?

In astronomy, ground-based telescopes use charged-coupled device (CCD) sensors to measure the color of asteroids in the visible wavelength range (see here for example). If I'm not mistaken, CCD ...
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1answer
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How an asteroid enters the Earth make a completely different outcome? [closed]

In this scenario there are different ways an asteroid could enter the Earth's crust but does the aftermath differ? Think of the surface of the Earth as thin sheet of ice and the magma the water ...
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1answer
243 views

How fast could Earth spin and sustain life? [closed]

When dinosaurs roamed the Earth was the Earth rotating faster creating less gravity to allow for their size? How fast could have the Earth spin and be slowed down by an asteroid to the current ...
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1answer
87 views

Will 100 km body impact with Sun produce burn for people on Earth?

I think yes, but I need someone to look and check my reasoning: If 100 km size body will fall on the Sun it would produce the flash 1000 times stronger than the Sun’s luminosity for 1 second, which ...
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2answers
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Are asteroid collisions capable of exhibiting any kind of domino effect?

I had the idea that it could be used to terraform mars... but asteroids are very different from dominos, so I just want to know if it's even plausible. Anyways here is my terraforming idea: First get ...
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1answer
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Are there any models for distribution of asteroid sizes in a belt?

Question: Is there any function that can describe the distribution* of asteroid diameters expected within an*' asteroid belt? *: distribution as frequency of occurrence within the asteroid belt or ...
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1answer
82 views

What is the minimum possible size for an asteroid to be able to alter Earth's orbit? [closed]

Obviously, the question as posed in the title is very incomplete. Allow me to rephrase it in more specific terms: What are the minimum possible "combined parameters" (velocity, mass, angle of ...
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34 views

Translationally invariant speed distribution

During impact events, asteroids et al strike Earth at high relative speed, in part because objects in space move in random directions with no preferred reference frame with respect to which objects ...
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1answer
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NASA's asteroid mission and angular momentum

From NASA Asteroid Mission NASA is developing the first ever mission to identify, capture and relocate an asteroid to a stable orbit around the moon, and send astronauts to return samples of it to ...
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3answers
867 views

What is the scientific basis for comets vs. main-belt comets being composed of different materials?

Do we observe different events or activities on main-belt comets, or do they behave exactly the same as regular comets? (Apart from the obvious difference in orbit size/shape.) The Wikipedia article ...
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1answer
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How can an asteroid fall to a planet?

According to the Kepler's first law, the orbit of an asteroid would be an ellipse having the planet at one of the focuses (to a good approximation). Then how come can it ever fall to the planet?
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Why did the asteroid belt between Mars and Jupiter form as it did?

I'm curious about why the asteroid belt wasn't pulled by Mars's or Jupiter's gravity or formed into either moons or planets. Why did it form into an asteroid belt instead?
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Could an asteroid land slowly on Earth's surface?

The concept in my mind is that an asteroid is on a vector similar to Earth's, but slightly slower (e.g., 50kmh slower). As Earth passes it, it enters the atmosphere at a sharp angle, and since Earth ...
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9answers
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What is the speed of the fastest moving body in our solar system?

On Wikipedia I saw that the average orbital speed of planet Earth around the Sun is a whopping $29 783\text{ m/s}$, and it made me wonder are there bodies (planets, meteorites, asteroids) that move ...
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What is the average distance between objects in our asteroid belt?

We've all seen sci-fi movies with asteroid belts that require "great skill" to fly through, but how dense is the asteroid belt really? How much of the belt could you see from the surface of a given ...
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Do asteroids create sonic boom while entering the atmosphere?

Because of the lack of any materials to propagate sound, it can't spread in space. There's the air in the atmosphere, but its volume mass increases constantly (either linear or exponential, I don't ...
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2answers
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Why is meteor speed what it appears to be?

Is the speed of a meteor through our sky because of the speed of the earth's axis rotation, or because the meteor is speeding towards us at that speed?
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1answer
82 views

Asteroid as a “free slingshot?”

The question Halley's Comet as a "Free Taxi" had an interesting thought, even though it didn't work out. I was wondering about a variation on the idea. Use a cable, as illustrated below. Could this be ...
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1answer
55 views

Observations of erratic rotation of asteroids

An asteroid generally has an irregular shape, therefore, one would expect its rotation is quite erratic in some sense. Are there any observational examples?
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How much of an asteroid mass can be in platinum or rare metals?

There are many articles about the 2011 UW-158 asteroid which will pass earth tonight. The interesting thing about this asteroid is that it is said to contain $5.4 trillion worth of platinum. Many ...