‘It snuck up on us’: Scientists stunned by ‘city-killer’ asteroid that just missed Earth
“People are only sort of realizing what happened pretty much after it’s already flung past us,” one astronomer said.
LightSail2 has just unfurled its sails and is now powered by the sun
The spacecraft is now harnessing sunlight to power itself on low Earth orbit. The news: Engineers pushed a button yesterday to unfurl LightSail2’s sails, which have a surface area of 340 square feet (32 square meters) and are thinner than a human hair. How it works: Rather than using wind to move, solar sails harness…
Astronomers are about to photograph a black hole and its point-of-no-return for the first time
They'll combine the power of many radio observatories to form an Earth-size telescope. Their target: A monster black hole at the center of the Milky Way.
Does an anomaly in the Earth's magnetic field portend a coming pole reversal?
Are we headed to a magnetic reversal and all the global disruption that would bring? Enter archaeomagnetism. A look at the archaeological record in southern Africa provides some clues.
How Our Solar System Will End In The Far Future
It took 13.8 billion years to get us to this point. But there's a whole lot of time left to go.
Why the Earth's magnetic poles could be about to swap places - and how it would affect us
The Earth’s magnetic field surrounds our planet like an invisible force field – protecting life from harmful solar radiation by deflecting charged particles away. Far from being constant, this field is continuously changing. Indeed, our planet’s history includes at least several hundred global magnetic reversals, where north and south magnetic poles swap places. So when’s the next one happening and how will it affect life on Earth?During a reversal the magnetic field won’t be zero, but will…