Asteroids

Near-Earth Objects (NEOs) are comets and asteroids that have been nudged by the gravitational attraction of nearby planets into orbits that allow them to enter the Earth's neighborhood. Composed mostly of water ice with embedded dust particles

No, water did not come from the asteroids a billion of years ago.

A meteor is the streak of light in the sky caused by a space rock or fleck of dust falling through the Earth's atmosphere. They are transient phenomena, and don't last long enough to be named.

Meteor showers, which are recurring about the same time every year, are the leftovers of generally ancient comets. Meteor showers are named by the constellation from which they appear to fall.

Meteorites, if large enough, are sometimes named by the location where they were found..

Well now, here we go again. When you start talking about the properties of

things moving near the speed of light, now you have to start specifying WHO

is measuring them.

-- If two scientists together got ahold of a piece of an asteroid one day,

brought it to their lab, measured its mass and its volume, calculated its

density, and each of them wrote the number down in his notebook, AND THEN . . .

-- If one of them somehow went to space and landed on that same asteroid,

while the other scientist, still on Earth, watched the asteroid shoot through

space at some high speed, THEN . . .

-- The travelling scientist, sitting on the asteroid and shooting through space,

could dig up a lump of it, measure its mass and volume, calculate its density,

check the number against his notebook, and he would find that it was still the

same density as before. It had not changed since he and his colleague did the

same measurement together in ther lab.

-- The scientist who stayed home ... if he had some way to measure the mass

and volume of a lump of the asteroid as it whizzed past him at a high speed ...

would find that its density has increased. That's because once the asteroid

started moving, any lump of it would shrink in the direction of its motion, while

the mass of the lump would become larger. More mass, divided by less volume,

would show up as increased density.

-- If the two scientists could communicate, they would get into a terrible argument.

Their answers would be different, and they would BOTH be correct.

-- And it would not even depend on the speed of the asteroid. It would happen

at ANY speed ... it's just that the DIFFERENCE would become greater as the speed

increases.

If you understand this, then you haven't read it carefully enough. What it describes

can't be. But it is.

I'm so glad you asked.

The address of the Belt Museum is: 37 Castner St, Belt, MT 59412

The address of the Belt Public Library is: 404 Millard St, Belt, 59412 0467

Mission Asteroid happened in 1980.

An advantage of mining asteroids is that the asteroidal metals and minerals are concentrated in a small, easily accessible space and they are much purer in content.

1411 Brauna (1937 AM) is a main-belt asteroid discovered on January 8, 1937.

Nothing much happened in Europe. Asia, on the other hand......

On Friday, February 15, 2013, a fairly large meteor exploded high in the atmosphere near the city of Chelyabinsk, Siberia, Russia (east of the Ural mountains, so on the Asia side...) with a force calculated as roughly 10X more powerful than the nuclear bomb that destroyed Hiroshima. The force of the explosion shattered windows all over town.

But because light travels far faster than sound, the brilliant flash in the sky attracted a lot of attention, and thousands of people ran to the windows to see what was happening. When the shock wave arrived minutes later, over 1100 people were injured by the flying glass.

This may have been the most powerful meteor impact since the Tunguska impact in 1908, which also happened in Siberia.

Well, since the universe is kind of huge and scientists and astronomers are not even cose to getting a bit past Pluto I'm gonna go out on a limb and say A TON (screw percntages).

No. The asteroid has passed, having missed Earth by about 17,000 miles. That's fairly close, but scientists new it would miss by about that much.

Yes. Fortunately, there's not much of a chance that

that's going to happen any time soon.

It would be dependent on a large number of factors, but in most cases I would assume the short answer to be yes. The main factors i could see being involved would be the angle of approach it had toward the sun, what speed it was already moving at before it became significantly effected by the suns gravity and what other large gravitational fields or solid objects it would encounter before passing the sun. But assuming it was moving fairly slowly and it was not on a path to take it into another object or force to cause it to lose momentum, I would say it would most definitely speed up as it was pulled toward the sun; as the gravity becomes stronger as it gets closer due to being pulled in. If it wound up on a direct course towards the sun at some point the gravity increase would become exponential and it would most definitely accelerate a great deal before being destroyed.

There is no way to avoid an impending collision.

There is no real distance at which this occurs. Asteroids are generally moving too fast to be simply pulled in by earth's gravity, though their paths can be altered. As evidence of this, ab object that is simply pulled in by Earth's gravity would strike the surface at close to escape velocity, which is about 25,000 mph for Earth. Most asteroids are moving much faster.

In many cases, a collision happens when an orbital resonance develops. Earth's gravity periodically jostles the asteroid's path so that it will pass fairly close to earth at regular intervals until that paths intersect and a collision occurs.

There are three basic categories of meteorites. The easiest ones to recognize were the iron or nickel-iron meteorites; most of the others look pretty much like rocks, but before people knew how to smelt iron, nickel-iron meteorites really stood out.

Another type is the stony meteorites, subdivided into chondrites and achondrites... as you might guess from the name, they're made of rock. The chondrites contain small round particles called chondrules, the achondrites don't.

Finally, there are the stony-iron meteorites, which are partly rock and partly metal.

Ceres is the largest object in the asteroid belt.

Asteroids larger than 1 km in diameter are known as planetesimals, while those over 100 km are considered minor planets. Asteroids larger than 1,000 km are usually classified as dwarf planets if they have enough mass for gravity to shape them into a round shape.

Asteroids do not catch on fire, nor does the so-called "fire" occur in space. When an asteroid is in space it is simply a lump of rock of rock and/or metal. When an asteroid strikes the atmosphere of a planet, it does so at an incredibly high speed, in Earth's case at least 25,000 miles per hour and sometimes as fast as 100,000 miles per hour. At such speeds the air around and in front of the asteroid will become extremely hot and turn into glowing plasma, which looks somewhat like fire. It is not true fire as the materials that make up and asteroid are not flammable and no combustion is taking place.

Scientists believe that fallen debris from an asteroid impacted on dry soil and rock caused Earth to form. This is referred to as "The Big Bang Theory".

A.

Mercury and Venus

B.

Jupiter and Saturn

C.

Neptune and Pluto

D.

Mars and Jupiter

the answer is D

No. An asteroid is a relatively large chunk of rock and/or metal in orbit around the sun. The asteroid belt is a region in the solar system between the orbits of Mars and Jupiter where the majority of the asteroids orbit.