9. If You Could Compress The Earth Down To The Size Of A Marble It Would Collapse On Itself And Become A Black Hole

9. If You Could Compress The Earth Down To The Size Of A Marble It Would Collapse On Itself And Become A Black Hole

Mass and gravity are difficult concepts to get your head around for the uninitiated. It took a tree falling on Newton's head to give him a nudge into starting the research, and we're still advancing theories today, but this is a cool one.

If you shrunk the Earth down in size, but not in mass - that is to say you made it physically smaller but maintained its weight - it would eventually become a black hole, so dense that the gravity it generated would suck in everything around it, even light. German scientist Karl Schwarzchild did the math for us shortly after World War I and calculated that for the Earth to reach this fearsome density, it would need to be 8.7 millimeters in radius. At that point it would essentially implode and drag in the rest of the Solar System; even the Sun.

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Did You Know...

I

Whether celebrities are looking to be in the spotlight or escape the paparazzi, there are some popular vacation destinations that always seem to be frequented by the stars. Celeb spotting is a favorite pastime of many travelers, and you might be able to snag a photo or even an autograph when you visit these top celebrity vacation spots around the world. Although the price tags may be a bit higher in these destinations than your average budget getaway, these are some of the best celebrity vacation spots that you can start saving up to visit and enjoy the trip of a lifetime.

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One of the classiest celebrity vacation spots in Europe is Mallorca, Spain. It’s known as a spot to be posh more than a spot to party. Michael Douglas and Catherine Zeta Jones have a house here, and it’s been a favorite getaway for Gwenyth Paltrow. Some of the local favorites that boast the most celebrity sightings include the Wellies Restaurant and Bar, Puerto Portals, and Es Trenc Beach.

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Saint Tropez is known for its amazing beaches and blissful landscapes. Celebrity couples like Beyoncé and Jay Z and David and Victoria Beckham have been spotted vacationing along these famous beaches. The Cote d’Azur seaport is a big draw for celebs here, as well as top beach clubs like Club 55.

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Perhaps the most well-known celebrity that loves Lake Como is George Clooney. He has a villa with over a dozen rooms here so he can bring all his friends along to relax, get away, and party. Villa d’Este is another popular place celebrities choose to stay because of its attention to privacy. Just ask Arnold Schwarzenegger, Bette Midler, or Sylvester Stallone!

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Sure, there are plenty of celebrities that call Sydney home year-around, but there are lots of others who like to visit for a surfing and sailing getaway. Sydney’s Bondi Beach has been a top vacation pick for Leonardo DiCaprio and Hugh Jackman, and some A-list accommodations are the InterContinental Hotel and the Park Hyatt in the Rocks.

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