Questions tagged [asteroids]

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

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2answers
42 views

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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0answers
53 views

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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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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27 views

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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0answers
30 views

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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1answer
20 views

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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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
77 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
234 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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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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1answer
72 views

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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1answer
107 views

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
116 views

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
274 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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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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2answers
423 views

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
50 views

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
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
82 views

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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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
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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1answer
175 views

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
128 views

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
90 views

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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3answers
4k views

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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1answer
151 views

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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2answers
2k views

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
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
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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2answers
338 views

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 ...
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0answers
79 views

Would impact angle matter on relativistic impactor?

I'm trying to calculate (for fun) a comparison between a kinetic impactor and an H-bomb. I would assume this to be a fairly straight forward problem involving kinetic energy and a table of various H-...
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1answer
75 views

Protoplanet formation & Kessler Syndrome

In the early stages of the solarsystem rocks clumped together randomly until their gravity drew in more material which led to protoplanet formation. But how does the dust and do the rocks form bigger ...
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1answer
771 views

Solar System Snow Line: 5AU or 2.7AU?

I am trying to update the Wikipedia article "Frost Line (astrophysics)". During my last update (by QuantumShadow), I noticed that different sources cite different values for Solar System water ice ...
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5answers
1k views

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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9answers
18k views

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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2answers
3k views

Why would the lack of air in a mine in an asteroid prevent you from flooding it?

In Isaac Asimov's I, Robot novel, two scientists stationed in an asteroid where mining activities are performed say "We could flood the mines, if this weren't an airless asteroid" when considering ...
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1answer
126 views

Why was the asteroid 101955 Bennu chosen by the NASA OSIRIS-REx sample return mission?

Please explain it in simple terms. Why was THIS asteroid chosen among all the thousand of asteroids?
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3answers
541 views

Armageddon prevention

I was watching the movie Armageddon and it made me think of a few things. We would probably not need to send a crew to blow the asteroid in two, I think we could still send a warhead with enough power ...
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3answers
12k views

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
122 views

What happens when some asteroid comes in the way of warp drive?

Recently Harold white, NASA scientist shared his knowledge and the things he is working on. That is Warp drive for interstellar navigation. This spaceship compresses the space in front of it and ...
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2answers
184 views

Properties of an object whose collision with Earth would completely disintegrate Earth

This picture got me thinking, whether such collision would be possible, and would it really look like that from the moon. What would be the properties (mass, size, velocity etc.) of an object, whose ...
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2answers
619 views

Would a considerably big asteroid be disintegrated by the Earth's Roche limit?

If there was a big asteroid with a diameter of say 50km+ in a collision course with the Earth (not orbiting), would it disintegrate into smaller chunks due to the Earth's Roche limit, or the time it ...
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759 views

How fast do large asteroids usually travel?

I have just watched this video made by discovery channel, and you can hear the narrator at 0:51 saying that : "even though it is moving at 720 THOUSANDS kilometers per hour..." I stopped once I heard ...
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1answer
208 views

Asteroid collision debris calculation

I wonder how to determine the directions, in which the collision debris is launched when 2 asteroids collide. I am aware of: m1*v1 + m2*v2 = m*v = m3*v3 + m4*v4 + m5*v5 + ... and this works just fine ...
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1answer
136 views

What sort of rocket propulsion would be required to send and retrieve ores from our solar system's asteroid belt, within a 2 year period? [closed]

I am looking for a form of propulsion to achieve a fraction of C that could send and retrieve mining robots to our solar system's asteroid belt. Does this type of propulsion even currently exist?