earth

September 12, 2019

About 110 light years away is a planet twice Earth’s size with water vapour in its atmosphere, and it may be the best place to look for alien life that we have yet seen. The detection of water there marks the first time astronomers have characterised the atmosphere of a planet of this size.

August 29, 2019

Earth seems like the perfect hub for life because it's the only planet known so far to host it -- but new research suggests that other planets could have oceans that are even more hospitable, offering life that is more varied than we know it.

August 26, 2019

The conventional wisdom is that if you want to look at more distant objects in the universe, you need a bigger telescope. What if you didn’t have to build one, though? A new analysis claims it may be possible to use the Earth’s atmosphere as a giant lens to observe far-away stars and galaxies on the cheap. The process may even work in reverse to send signals to distant locales.

August 25, 2019

All is not what it seems in the world of lunar samples. If you put a moon rock alongside one from Earth, they usually don't have a lot in common. So when Curtin University planetary scientist Professor Alexander Nemchin looked closely at a moon rock in his laboratory, he realized something wasn't right.

August 18, 2019

Earth's magnetic field seems steady and true--reliable enough to navigate by. Yet, largely hidden from daily life, the field drifts, waxes and wanes. The magnetic North Pole is currently careening toward Siberia, which recently forced the Global Positioning System that underlies modern navigation to update its software sooner than expected to account for the shift.

July 28, 2019

This asteroid wasn’t one that scientists had been tracking and it had seemingly appeared from “out of nowhere,” Michael Brown, a Melbourne-based observational astronomer, told The Post. According to data from NASA, the craggy rock was large, roughly 110 yards wide, and moving quickly along a path that brought it within about 45,360 miles of Earth. That’s about one-fifth of the distance to the moon and what Duffy considers “uncomfortably close.”

June 25, 2019

The poll by The Associated Press and the NORC Center for Public Affairs Research, released Thursday, one month before the 50th anniversary of the Apollo 11 moon landing, lists asteroid and comet monitoring as the No. 1 desired objective for the U.S. space program. About two-thirds of Americans call that very or extremely important, and about a combined 9 in 10 say it's at least moderately important.

March 26, 2019

If someone asks you what planet is closest to Earth, you’ll probably blurt out Venus. That’s a perfectly normal thing to say, but it’s also wrong. Numerous websites and even NASA itself say Venus is our closest planetary neighbor. A new article in Physics Today lays out a more accurate way to determine which planets are closest together. It turns out the averages are highly counterintuitive. Mercury is the closest planet to Earth -- in fact, it’s the closest planet to every other planet.

March 19, 2019

It may not look like much, but this orangey brown puff of smoke high is the aftermath of the third largest meteor explosion to have impacted Earth in modern times. The huge meteor explosion hit Earth in December but was only spotted by researchers last week, and now we have visual evidence thanks to the camera of the geostationary Japanese Himawari-8 weather satellite.

March 19, 2019

A meteor caused a massive explosion over Earth last year, but nobody noticed until now. It is the second-largest recorded impact in the past century, after the meteor that exploded over the Russian region of Chelyabinsk in 2013. The giant fireball hit at 2350 GMT on 18 December over the Bering Sea, a part of the Pacific Ocean between Russia and Alaska.

Pages