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The iconic Earthrise photo from Apollo 8. Photo: NASA

The First Time Humans Orbited the Moon

Daniel Hautzinger

On Christmas Eve of 1968, the three astronauts of Apollo 8 read from the Bible while broadcasting images of the moon from closer than any person had ever been. Not only was it the first manned spacecraft to orbit the moon, it also gave us one of the most iconic images ever. 
An illustration of a black hole. Image: Courtesy WGBH

Curving Spacetime: Mind-Boggling Facts about Black Holes

Daniel Hautzinger

They're a curvature in spacetime that even light can't escape; an object sucked into one is crushed into an infinite density. We haven't been able to see them, but we can hear them, in a sense. Learn more confounding information about these enigmas of space.
Astronaut Scott Kelly. Photo: Victor Zelentsov / NASA

How a Year in Space Affects the Human Body

Daniel Hautzinger

Astronaut Scott Kelly spent 340 days in space while his twin brother Mark stayed on Earth. Scientists are comparing the brothers to understand the effects of space on the human body. What have they learned? How do humans fare after a year in space?
Jupiter, Saturn, and Neptune in photos taken by the Voyager spacecraft. Photo: NASA/Jet Propulsion Laboratory

One of Humanity's Most Astonishing Achievements

Daniel Hautzinger

With less computing power than a smartphone, the Voyager spacecraft have traveled more than twenty-two billion miles between them, carrying a Golden Record documenting earth. Launched forty years ago, the Voyager mission is the first human-made object to reach interstellar space.
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