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Asteroids
Asteroids, or planetoids, are rocks larger than meteorites but smaller than planets that orbit around the Sun.
1,071 Questions
Asteroids orbit the sun at several tens of thousands of miles per hour. The speed varies depending on the orbit.
Do asteroid hurt our atmosphere?
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Asteroids can vary in size from a few meters to hundreds of kilometers in diameter. Some asteroids are small, like pebbles, while others are quite large and can even be classified as dwarf planets. Size is one of the factors used to categorize and characterize asteroids.
Where are most asteroids in our solar system found in space?
Asteroids are found all over the solar system. The vast majority is located in the asteroid belt between the orbits of Mars and Jupiter.
What are the differences between Pluto an a asteroid?
Pluto is technically an asteroid, but it's unusual in that it is ball-shaped. most asteroids are too small to form a ball shape.
Why don't asteroids have atmospheres?
Asteroids are too small to have enough gravity to prevent any atmosphere form escaping.
Could a meteor blow up the earth?
Astronomers estimate between 36 and 166 meteorites larger than 10grams fall to Earth per million square kilometres each year. Over the whole surface area of Earth, that translates to 18,000to 84,000meteorites bigger than 10grams per year. But there is no confirmed evidence of anyone having died from a meteorite strike.
On the other hand, it is thought that a meteorite strike was responsible was the mass extermination which led to the end of the dinosaurs.
What is the distance between asteroid Belt and the sun?
This is known as the Asteroid belt. Its mainly smaller bodies, but there are a few big asteroids in there also. The biggest object there is known as Ceres. Its about 1000km in diameter, and now classed as a dwarf planet.
Will there be another mass extinction in the future?
It is unlikely that you will meet anyone who will live to see a mass extinction on earth. Inevitably yes, if we're talking millions of years then of course "nothing lasts forever." It is a bit bullheaded for someone to think that their generation is lucky enough to witness the end of all things. It's a hard question to answer realistically without sounding like a doomsdayer, but some biologists think we are already in one. Some even say that species are disappearing at a faster rate today than they were following the meteor impact 65 million years ago. Millions of species have been lost through deforestation,particularly of tropical rainforest, which support most of the world's species.Around half of the world's forest is already cleared. In the oceans,species such as the Atlantic cod are close to collapse, and were incredibly abundant only 200 years ago.Our population is exploding and now global warming has been added to the mix.Yes, the Earth is in danger of another mass extinction.
What is the radius of asteroid vesta?
The mean radius of the asteroid Vesta is about 262.7 kilometers (163.2 miles).
Does an asteroid have holes in it?
Some asteroids have natural cavities or depressions on their surface, but they are not typically "holes" in the sense of having passageways through them. These features can be caused by impacts or the gravitational forces acting on the asteroid.
What can you see in the sky an asteroid a comet or a meteor?
If you land a space ship on a comet or asteroid, then you can touch those (at great peril); meteorites are meteors that have struck the Earth, so you can touch those here on Earth with much less peril.
Where do scientists think asteroids originate?
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but the real reson is that's how God created it
when i wrote sons i ment suns
soz
Does the asteroid belt have any moons or rings why?
Only a few have been observed. There are several relatively small Kuiper Belt objects that have tiny moons. Two NEOs (Near Earth Objects) each have two confirmed satellites: 1994-CC and 2001-SN263.
1994-CC (700 m in diameter) is actually smaller than the "moons" of the other NEO and its own satellites are only a few meters in diameter.
There are also asteroid groups that revolve around common centers of gravity for various lengths of time. But asteroids that orbit each other are more properly described as "double asteroids" rather than an asteroid and moon. The term "moon" refers typically to bodies orbiting major planets.
Is Ceres the biggest of an asteroid or a comet?
Ceres is smaller than any planet; even smaller than Pluto.
What is the orbital period of an asteroid that has a semimajor axis of 2.8 au?
Even if we assume that the central mass is our sun, the question is still insufficient for an answer as just giving the semi-major axis isn't enough. We need to know the minor axis as well to calculate the eccentricity.
How does an asteroid form from comet?
Virtually impossible.
For a comet to do this it would have to already contain a stony and/or metallic core (i.e. an asteroid), then slowly over time lose its outer icy layer. However to the best of our knowledge comets do not have such cores, they are ices and dust and a mixture of various sizes of small stones. Once the ices are lost the dust and small stones spread out in the orbit previously occupied by the comet (if this orbit intersects earth's orbit it produces often spectacular annual meteor showers).
What would happen if a massive asteroid enters earth's atmosphere?
Like most other asteroids that do so, it would burn up and simply fall to the ground as fine dust particles. If it were to 'skim' the surface of the atmosphere, it would be pulled slightly towards Earth; at the right speed and height, this would cause it to begin orbiting. Otherwise it is likely to either have its travel affected, and pass through on a path bent from its original one before continuing on, or slow down so much that it began falling directly to Earth (in which case it would either burn up or land and make a small crater or splash). If the asteroid were big enough, even by passing close enough to Earth, it can have an effect on the tides on the surface nearest it; it may also begin orbiting, although this has an extremely low probability.
Why aren't asteroids called planets?
None of the asteroids are considered planets:
- they are too small
- they are not massive enough to become spheroidal
- they often collide with each other (or sometimes the planets)
- etc.
