Comet 46P/Wirtanen will make its closest flyby on Sunday, Dec. 16, passing 7.1 million miles from Earth. It may even be bright enough to see without a telescope. Photo galleries & how to observe: https://go.nasa.gov/2EAoGvM
An initiative called Breakthrough Starshot wants to explore another star system using ultra-powerful laser beams and wafer-thin spaceships.
It’s a goal that sounds so fantastic, you’d be forgiven for dismissing it as science fiction. But it’s no joke, and the project’s chief engineer says millions of dollars’ worth of work is moving along without any major snags.
Starshot’s founders and collaborators include the late Stephen Hawking, Harvard University astronomer Avi Loeb, and Russian-American billionaire Yuri Milner. The concept is based on more than 80 scientific studies about interstellar travel.
Space agencies are working hard to get humans back to the surface of the Moon. But it’s not exactly the most inviting place.
Astronauts during the Apollo 11 mission in 1969 may not have had any health incidents while they were gleefully bouncing around on the lunar surface, as a NASA mission report from the time points out. But they knew that lunar dust wasn’t their friend — it could irritate their lungs, cause their Moon buggies to overheat — it even started degrading their spacesuits.
NASA’s Hubble Space Telescope spotted a rare, medium-size “hot Neptune” planet in a solar system far beyond our own. Why are there so few exoplanets of this size? Some clues: the planet orbits very close to a young star, and its atmosphere is evaporating rapidly from the blistering radiation. https://go.nasa.gov/2rBCwW4
Posted in space
Virgin Galactic just brought human spaceflight back to American soil after a seven-year hiatus, and other private companies are poised to make some giant leaps of their own.
Virgin’s VSS Unity suborbital spaceliner soared to a maximum altitude of 51.4 miles (82.7 kilometers) during a rocket-powered test flight over California’s Mojave Desert yesterday (Dec. 13).
The milestone marked the first U.S.-based crewed trip to the final frontier since NASA grounded its space shuttle fleet in July 2011. And it was the first spaceflight ever by a private vehicle designed to carry commercial passengers. (By one measure, anyway: Though many people place the boundary of outer space 62 miles, or 100 km, up at the “Karman Line,” the U.S. Air Force awards astronaut wings to personnel who reach an altitude of 50 miles, or 80 km.) [In Photos: Virgin Galactic’s SpaceShipTwo Unity Soars to Space].
