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Comet: are space object that's made of rock,dust and metal they are covered by ice it orbit around the sun.

Asteroid: a small rocky body orbiting the sun. Asteroid orbits the sunlike planet but they are much smaller than planets.

meteoroid: a small body moving in the solar system that would become a meteor if it entered the earth's atmosphere. Meteoroids are lumps of rock or iron that orbit the sun .

Meteors: a small body of matter from outer space that enters the earth's atmosphere.

meteorites: a meteor that survives its passage through the earth's atmosphere such that part of it strikes the ground.

-Rashdan

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Comets: Comets are balls made out of dust, rock, and metal. They are surrounded by icy shells that orbits around the sun and if they are near something hot they will sublimate and it creates a halo around the comet and the sun blows it giving it a tail.

Asteroids: Asteroids are Comets without the icy shell, it is only made out of dust, rock, and metal. Asteroids are usually in between Jupiter and Mars in something called the asteroid belt.

Meteoroid: Meteoroids are pieces of rocky space debris that floats in our solar system. Meteoroids are larger than a dust grain but smaller than asteroids. Some meteoroids are the size of a pebble.

Meteors: Meteors are Meteoroids that hit the earth’s atmosphere. It burns up when it hits the earth's surface and we know them as shooting stars.

Meteorites: Meteorites are Meteoroids that actually make it to the earth's atmosphere and hit the surface of the earth. Meteorites are too small to be detected and they come without a warning. They travel so fast, it is dangerous for the earth.

-Rafa

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comet: objects in space that are made of rocks and dusts. They are covered in ice and orbit around the sun

asteroid: an object in space that is very similar to comets but they do not have ice covering them

meteoroids:  space object made of rock or metal.

meteor: rock in space that enters the earth's atmosphere but burns up

meteorites: meteoroids that actually hits the earth's surface

-Rafael

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Comet : Comets are space objects that is made of rocks and dust particles. As it is near the sun, it will form a coma. Because of its orbit, it can form one or two tails near the sun.

Asteroids : A space object similar to a comet, the only difference is that it does not have icy layers. They revolve around the sun and usually appears in asteroid belts.

Meteoroids : Small space object that travels through space.

Meteor : Meteoroids that burns in the Earth's atmosphere.

Meteorites : Meteoroid that crashes onto the surface of a planet or moon.

-Matthew

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Comets: Space objects that are made up of dust, rock, and metal. It also has an icy shell covering it. It orbits the sun but when it gets too near to something hot its ice shell turns to a gas state. Its coma gives the comet its tail

Asteroids: Its basically comets without the ice. Asteroids can form in an asteroid belt between Mars and Jupiter. Asteroids can also cause great danger

Meteoroids: They are pieces of rock debris and they are usually the size of a pebble. Meteoroids can come from an asteroid belt, the moon, or even Mars.

Meteors: It can hit earth's atmosphere and it burns up when it hits the earth's atmosphere. It can be known as shooting stars. The size of meteors are small.

Meteorites: It is simply a meteoroid that can possibly pass earth's atmosphere. Meteorites are too small to be detected and they travel at a high velocity.

-Adeel

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Comets: Comets are space objects that are made from rock, dust, and metal. It is covered in ice which sublimates when it’s orbiting the sun. Its coma is what creates its tail.

Asteroids: Asteroids are the same as a comet just without ice covering it. They come from the asteroid belt in between mars and Jupiter.

Meteoroids: Meteoroids are pieces of space debris that just floats around the solar system. They are smaller than asteroids and usually comes from the asteroid belt, the moon, or mars.

Meteors: They are meteoroids that hit earth’s atmosphere. They burn up when they hit earth’s atmosphere. We know meteors as shooting stars.

Meteorites: Meteorites are meteoroids that that pass through earth’s atmosphere and hit earth’s surface. Even tough meteorites are small it travels really fast which makes it dangerous.

-Nafisa

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Comet: Comets are made out of rocks, dust, and it is also layered with ice. It also orbits around the sun.

Asteroids: It is similar to comets, but it is not layered with ice.

Meteoroids: It is a small rocky or metallic body floating in outer space.

Meteors: It is a streak of light in the sky caused by a meteoroid crashing through Earth's atmosphere

Meteorites: A meteoroid that strikes the surface of a moon or planet

-Zivanka

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Comets: They are made out if dust, rock, and metal surrounded by an icy shell, when they get too close to something hot they sublimate and create a tail.

Asteroids: They are basically comets without the ice, they come from a olace called an asteroid belt.

Meteoroid: They are just a pice of rocky space debris, they usually come from our moon or mars.

Meteors: They are basically meteoroids that actually hit the Earth's atmosphere, we see them as shooting stars.

Meteorites: They are basically meteroids that succesfully pass through the Earth's atmosphere and hit the surface.

-Arga

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Comet: Made out of dust, rocks, metal and layered with ice. It orbits the sun.

Asteroids: simillar to comets but it isnt layered with ice.

Meteoroids: pieces of rocky space debris that floats around the solar system. most meteoroids are usually only the size of a pebble.

Meteors: meteors are meteoroids that hit earth's atmosphere. its also known as shooting stars.

Meteorites: meteorites are meteoroids that hits the earth's surface.

- Aurora

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Comet : Made out of rocks and dust layer also with ice, it also orbits the sun.

Asteroids : Similar to comet however they dont have ice.

Meteors : Rocks that hits earth's atmosphere and burns up in earths atmosphere.

Meteorites : Rocks that can hit a planet or the moon's surface.

Meteoroids: rocky space debris that flies around the solar system.

- Khansa

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Write down what you know about the celestial bodies. You can duplicate this post to answer.

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Write down what you know about the celestial bodies. You can duplicate this post to answer.

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You may want to read this.;)

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The goal of these observations is to look for any hints of brightening in the Didymos system, which will provide crucial information about how much dust and pulverised rock the impact kicked up. More than three dozen ground-based telescopes will now get to work making precise measurements of the moonlet's new orbit. And in 2026, a spacecraft called Hera built by the European Space Agency (ESA), will arrive to monitor the collision's aftermath.

"This inaugural planetary defence test mission marks a major moment in human history," Bobby Braun, head of APL's space exploration sector, said during a pre-impact briefing on September 12. "For the first time ever, we will measurably change the orbit of a celestial body in the universe."

Our first look at Dimorphos

DART launched atop a SpaceX Falcon 9 rocket on November 23, 2021, and set sail for its rocky destination.

Didymos is what's called an S-type asteroid, one of the more common types of near-Earth asteroids. Like many asteroids, Didymos is a relic of the infant solar system, containing preserved records of what our neighbourhood was like 4.5 billion years ago.

Dimorphos, however, was a mystery until tonight. Scientists suspected it was made of similar materials to Didymos, and they guessed that it might be a loosely assembled rubble heap rather than a single shard, but its mass, shape, and composition were unknown. In the weeks leading up to the impact, team members started speculating about what it would look like-a dog bone or a donut, for example, would be tougher to hit. But a roundish blob would make for an easier target.

As DART streaked toward its rendezvous with destiny, the spacecraft's onboard camera DRACO got its first good look at the moonlet: a lumpy egg-shaped moonlet with discernible boulders on its surface. About two minutes before impact, Dimorphos filled the spacecraft's view. DRACO snapped images once per second, creating a close encounter sequence that contains a trove of science data-and also revealed that the mission had succeeded. When transmissions from DART ended, the team knew the spacecraft had struck its target.

"These images will continue until they don't, so that'll be a pretty definitive look into the final moments of the DART spacecraft," Chabot said before the impact.

Bull's-eye in space

For most of its 10-month journey, the DART spacecraft couldn't even see its target-instead, it was autonomously guided to its rendezvous with Dimorphos by onboard navigation software. After the asteroid pair came into view as a few small pixels, DART's SMART Nav system locked on to Didymos. On final approach, about 50 minutes before impact, the system switched over to the moonlet and guided the spacecraft to its crash site. Making sure DART was locked on to the right object was crucial.

"That's a very sweaty time for us," Evan Smith, DART's deputy mission systems engineer said at a briefing before the impact. "We're going to be watching the telemetry like hawks, very scared, but excited." If DART missed its target, the team wouldn't have another opportunity until 2024.

"This is a par one course, so we're going in for the hit this time," Smith said. "We do have an opportunity coming up in two years, but we don't want to play that round of golf."

To test the crucial guidance system, DART's DRACO camera swivelled to stare at Jupiter and its four largest moons in July and August of this year. Watching as the icy moon Europa popped out from behind the watercolored world, DART was able to practice locking on to a small object emerging from behind a larger one, similar to what the spacecraft would encounter as Dimorphos rounded the bend of its parent asteroid just before the collision.

Lining up the shot was kind of like playing darts, mission systems engineer Elena Adams said, except you're throwing the dart from John F. Kennedy International Airport in New York City to a target at Washington Dulles International Airport outside Washington, D.C.

"The dart itself is only 2.5 millimetres-it's tiny-and you take the dart at JFK and you throw it to Dulles, and you hit the centre of the bull's-eye, except you don't know where the dartboard is at," Adams told reporters.

The search for deadly asteroids

Asteroid deflection technology will only be useful if there is something to deflect, which is why NASA and other institutions are focused on finding and tracking all the space rocks that could be on Earth-crossing orbits.

"We're not aware of a single object right now, within the next hundred years or so, that's really threatening the Earth. I also guarantee you that if you wait long enough, there will be an object," Thomas Zurbuchen, NASA's associate administrator for science, said at the pre-impact briefing. "How do I know that? Because as we go back in time, these objects have really affected our history. We have a geologic record to prove that."

Earth's evolution has been moulded by impacts from the very start. Comets and asteroids have pummelled the planet since it was a molten planetary embryo. Some of these objects delivered the water that now fills Earth's oceans, lakes, and streams. Others ignited cataclysmic mass extinctions.

Scientists suspect we've located the bulk of potentially harmful asteroids, defined as bodies more than 450 feet across that come within five million miles of Earth. Most of the largest, which are more than six miles across and could cause a global extinction event, have been found. And the space agency estimates that it has discovered roughly 95 percent of asteroids that are about the size of Didymos. But smaller bodies, about the size of Dimorphos, are harder to identify and track. Rocks that size could obliterate a major city, and NASA estimates that we've found less than half of those objects.

"The most important thing we have to do first is find the population of hazardous asteroids out there," Lindley Johnson, NASA's planetary defence officer, said at the briefing. "We have the technology now to do this and to find these objects years, decades, even a century before they pose an impact threat to the Earth."

Finding the remainder of these asteroids, Johnson says, will need to be done from space. In the coming years, NASA plans to launch a telescope called the Near-Earth Object Surveyor, which will be able to pick up the infrared signatures of space rocks that are hidden by the glare of the sun, helping to make sure humanity doesn't get blindsided by an unseen asteroid in the future.

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To practice saving the world, NASA just crashed a spacecraft into an asteroid

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The DART spacecraft slammed into a harmless space rock to change its orbit-a tactic that could be used one day to stop a killer asteroid from hitting Earth.