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What protects the earth from most hits by objects from space is the atmosphere. A meteoroid may hit earths atmosphere at a speed of 50 to 60,000 miles an hour, Even with how thin earth's atmosphere is at high altitudes, there is still enough atmosphere to create enough friction on the rock to heat it to incandescence (like a light bulb filament). More than enough heat is generated to burn the rock to a mote of dust before it ever hits the ground. But in your question, you asked what prevents asteroids from hitting the earth. Well, nothing - something the size of an asteroid would burn only partially on the way down, and would hit earth intact. The size becomes important here. If it's the size of a schoolbus, it will make a big crater (if it hits on land) and get lots of news coverage. That's about it. But if it's 6-8 miles in diameter, it will wreak catastrophic destruction and mayhem here on earth - even if it lands in an ocean.
What else can I help you with?
What planet got hit by an asteroid?
Jupiter :P
How great are the chances that an asteroid can hit your planet?
its a fifty fifty chance we just dont know It depends on how fast the asteroid is moving and the size of the asteroid. Then you have to consider the size of the planet (diameter, etc.), and its orbital speed, etc.
What is the impact of asteroid when it direct hit the planet?
There is no "impact asteroid". An asteroid impact however is when an asteroid hits a planet or moon.
Has a Asteroid ever hit Uranus?
There is no definitive evidence of an asteroid hitting Uranus. However, the planet's moons may have been impacted by asteroids in the past, as seen by the presence of impact craters on their surfaces.
How did water come to planet earth?
a large ice asteroid came form space and hit earth malt with volcano
What planet got hit by an asteroid?
Jupiter :P
What is the name of the asteroid that hit planet earth that set perfect orbit and rotation as we know it?
It was not an asteroid. It was a planet. The name starts with an 'M'.
How great are the chances that an asteroid can hit your planet?
its a fifty fifty chance we just dont know It depends on how fast the asteroid is moving and the size of the asteroid. Then you have to consider the size of the planet (diameter, etc.), and its orbital speed, etc.
Can an asteroid be a planet?
NO.
What is the impact of asteroid when it direct hit the planet?
There is no "impact asteroid". An asteroid impact however is when an asteroid hits a planet or moon.
What does a comet or a asteroid create when they hit a planet?
An impact crater. The size depends on the mass and speed of the object and where it strikes
Was there ever a planet in the Asteroid belt?
No planet ever existed where the asteroid belt is. The mass is insufficient for a planet to have formed from all that debris.
Where is the asteroid belt in the planet Jupiter?
The asteroid belt is not in Jupiter.
Is the asteroid belt a gas or a solid?
the asteroid planet is solid
Has a Asteroid ever hit Uranus?
There is no definitive evidence of an asteroid hitting Uranus. However, the planet's moons may have been impacted by asteroids in the past, as seen by the presence of impact craters on their surfaces.
Is an asteroid an exploded planet?
no
What is Jupiter next too?
The Planet Jupiter is between the planet Saturn and the asteroid belt. On the other side of the asteroid belt is the planet Mars.
