See how the former Soviet Union planned to send astronauts to the moon using its N-1 rocket.

See how the former Soviet Union planned to send astronauts to the moon using its N-1 rocket.

The SLS is derived from proven technology used for decades in America's moon program and the space shuttle.

The SLS is derived from proven technology used for decades in America's moon program and the space shuttle.

In August of 2007, astronomers located a gigantic hole in the universe. This empty space, stretching nearly a billion light-years across, is devoid of any matter such as galaxies, stars, and gas, and neither does it contain the strange and mysterious dark matter, which can be detected but not seen. The large void in the Constellation Eridanus appears to be improbable given current cosmological models. A radical and controversial theory proposes that it is a "universe-in-mass black hole"

In August of 2007, astronomers located a gigantic hole in the universe. This empty space, stretching nearly a billion light-years across, is devoid of any matter such as galaxies, stars, and gas, and neither does it contain the strange and mysterious dark matter, which can be detected but not seen. The large void in the Constellation Eridanus appears to be improbable given current cosmological models. A radical and controversial theory proposes that it is a "universe-in-mass black hole"

Infographic: The nearest stars, their distances in light-years, spectral types and known planets.

Infographic: The nearest stars, their distances in light-years, spectral types and known planets.

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