The planet is 124 light-years from Earth - so it would take us hundreds ... Another user wrote: 'Relaxing and thinking about K2-18b,' with a picture of a topless Patrick Stewart in a 1990 episode ...

But according to the European Space Agency, it's getting incredibly crowded – at least around our planet. A European Space Agency report released April 1 studied the space above Earth.

The 1972 Blue Marble image, taken by astronauts in the Apollo 17 spacecraft, gave us another unique perspective of our planet, and its frailty, in its entirety. Earthrise, taken on Dec. 24, 1968.