5  Watch out for a space rock called Apophis 2068 Credit: Getty – contributor
"These orbited the earth for a short time before come back to earth. "
Russian scientists are afraid that Apophis, full name Apophis 99942, could crash into Earth at a rate of 15,000 miles per hour.
They say that the deadly mountain path around the sun means that there are 100 "possible collisions between Apophis and the earth, the most dangerous of them by 2068".
However, it's not time to panic yet – Apophis only has a 250,000 chance of actually colliding with our planet, according to Nasa.
"Apophis has been one of the heavenly bodies that has captured the public interest since it was discovered in 2004," said Nasa Steve Chesley.
"Updated calculation techniques and recently available data indicate the probability of an earthquake on April 13, 2036, for Apophis has dropped from 45,000 to about four in a million."
The 370-meter-wide space of rock was discovered in June 2017.  It was only discovered through a space telescope in Hawaii after it crashed off our planet and could have caused havoc if it hit Earth.
It passed within just 548,000 miles of our planet , relatively close in space
Although the asteroid is not large enough to wipe out the Earth, it can do some serious damage at the local level.
The huge spacecraft will fade in less than a tenth of the distance between the Earth and the Earth Moon 2029 – closer than some of our satellites.
And it will surely pass the earth again, with scientists uncertain how close its next flyby will come.
What is the difference between an asteroid, meteor and comet?
Here's what you need to know, according to NASA …
- Asteroid: An asteroid is a small rocky body orbiting the sun. Most are in the asteroid belt (between Mars and Jupiter) but they can be found anywhere (including in a path that can affect the Earth)
- Meteoroid: When two asteroids hit each other, the small pieces that break off are called meteoroids
- Meteor: If a meteoroid enters the earth's atmosphere, it begins to steam and then becomes a meteor. On Earth, it looks like a ray of light in the sky, because the mountain burns up
- Meteorite: If a meteoroid does not evaporate completely and survive the journey through the Earth's atmosphere, it can land on Earth. At that point it becomes a meteorite
- Comet: Like asteroids, a comet orbits the sun. But rather than being made mostly of stone, a comet contains a lot of ice and gas, which can result in fantastic tails forming behind them (thanks to the ice and dust evaporation)
Alberto Cellino of the Astrophysical Observatory of Turin said: "We can rule out a collision at the next closest approach with the earth, but then the trajectory will change in a way that is not entirely predictable at the moment, so we cannot predict the behavior on a longer time scale. "
A leading astrophysicist from Queen's University Belfast reckons an asteroid strike is just a matter of time.
In 1908, a small asteroid exploded over Tunguska in Siberia, destroying 800 square miles.
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In other space news, diamonds as old as the moon are blown off the Earth's surface by a "hidden lava stain".
A lost planet in the solar system was gobbled up by Jupiter billions of years ago.
And here is a complete list of asteroids that can crash on Earth.
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