That Pale Blue Dot: Astronauts Celebrate Earth Day for Slooh (And You Can, Too)
This Earth Day (April 22), the Slooh online observatory will broadcast astronauts and community members expressing what they love most about the planet.

This Earth Day (April 22), the Slooh online observatory will broadcast astronauts and community members expressing what they love most about the planet.
A pair of modified bombers will take to the air over Tennessee carrying instruments to observe the sun and the planet Mercury during the August 2017 solar eclipse.
NASA takes a deep dive into the pool of worlds that harbor or are suspected of harboring water in our solar system.
Auroras on the most volcanically active body in the solar system, Jupiter’s moon Io, reveal a larger core and a lack of magma ocean beneath the crust.
An incredibly powerful supermassive black hole has been found at the center of a tiny galaxy that is merging with another larger galaxy, a new study shows.
When an asteroid hits the middle of the ocean in Hollywood movies, it creates devastating waves that wipe out coastal cities. But new simulations reveal that real asteroids don't make such a splash.
The original "Star Trek" series isn't just a milestone of science fiction, it's also a treasure trove of mathematical ideas — as Space.com discovered when we attended "Star Trek: The Math of Khan" at the Museum of Mathematics on Thursday (April 6).
Galaxies of “all shapes and sizes” were captured by the telescope at ESO’s Paranal Observatory in Chile. The cluster is 65 million light-years from Earth.
More than two years after it splashed down, NASA's first space-flown Orion crew module has landed on exhibit near where it lifted off. The EFT-1 capsule, which launched in 2014, is now on display at NASA's Kennedy Space Center Visitor Complex in Florida.
NASA announced today that molecular hydrogen has been found in the plume of material blasting from the south polar region of Saturn’s moon Enceladus, suggesting that the ocean beneath its surface could have enough energy to support life.
What appears to be a huge plume of water vapor has again been spotted emanating from Jupiter's icy moon Europa, boosting scientists' confidence that the phenomenon is real.
Enceladus shines as one of the brightest objects in our solar system. See photos of Saturn's water ice-covered cold moon, as captured by NASA's Cassini spacecraft.
In 2016, NASA Hubble Space Telescope was used to observe a plume jetting out of the surface of the Jupiter moon. NASA producer Katrina Jackson explains how the plumes may have formed and a future mission to explore it.
The NASA probe detected molecular hydrogen as it passed through the plume of vapor and particles blasting through cracks on the surface of the Saturn moon in October 2015.
The same sorts of chemical reactions that sustain life near deep-sea hydrothermal vents here on Earth could be occurring within Enceladus' subsurface ocean, a new study suggests.
NASA’s Cassini probe’s deep dive through the plume has delivered a significant find. The discovery of molecular hydrogen (H2) is a major step in understanding whether or not Enceladus is habitable.
Since the 1960s, fans of "Star Trek" have watched generations of futuristic doctors diagnosing and curing crewmembers on remote planets. While our interstellar dreams are still dreams, the tricorder medical device is one step closer to reality.
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