Thanks to Trump, We’ve Got a Better Idea of the Capabilities of US Surveillance Satellites

The US President has done it again.

Just when you think things can’t get any more—”unusual”— in the White House, the President has Tweeted an American spy satellite image as part of a juvenile jab at Iranian leadership. After some sleuthing, astronomers were able to figure out which satellite it came from: a (formerly) top-secret satellite called USA 224, an optical reconnaissance satellite.

Continue reading “Thanks to Trump, We’ve Got a Better Idea of the Capabilities of US Surveillance Satellites”

Eruption of the Raikoke Volcano, Seen From Space

The Raikoke Volcano, dormant for a very long time, has awoken from its slumber. The volcanic island is in the Kuril Island chain, near the Kamchatka Peninsula in Russia. Unlike its more volcanically active neighbours, Raikoke has been dormant since 1924.

Thanks to astronauts on the International Space Station, we have gorgeous photos of the eruption.

Continue reading “Eruption of the Raikoke Volcano, Seen From Space”

The World’s Glaciers are Down by 9 Trillion Tonnes of Ice in the Last Half Century

This graphic shows the change in cumulative ice mass over the last 50 years in different glacial regions on Earth. Image Credit: ESA, adapted from Zemp et al. (2019) Nature, and data courtesy of World Glacier Monitoring Service

Things are not looking good for Earth’s glaciers. Usually, when it comes to climate change and melting ice, we think of the Earth’s polar regions. But they’re not the only important ice formations, and they’re not the only ice that’s melting due to climate change.

Continue reading “The World’s Glaciers are Down by 9 Trillion Tonnes of Ice in the Last Half Century”

Huge Asteroid Impact Crater Found Just Under the Ice in Greenland

The newly-discovered crater is 31 km. across, larger than Paris. Image: NASA's Goddard Space Flight Center.

An international team of scientists have discovered what lay hidden under Arctic ice for thousands or even hundreds of thousands of years. Using data primarily from NASA’s Operation IceBridge, they discovered one of the 25 largest impact craters anywhere on Earth. And its discovery may re-ignite an old climate debate.

Continue reading “Huge Asteroid Impact Crater Found Just Under the Ice in Greenland”

This is What Icebergs Look Like at the End of Their Lives. This One’s 18 Years Old

The coffin-shaped iceberg B-15T is drifting to its death after 18 years of "life." Image Credit: NASA/Jeremy Harbeck.

Nothing lasts forever, especially an iceberg drifting away from its frigid home. This coffin-shaped iceberg was spotted by astronauts on the International Space Station as it drifted northwards. It split off from a much larger iceberg about 18 years ago, and is moving into warmer and warmer waters.

Continue reading “This is What Icebergs Look Like at the End of Their Lives. This One’s 18 Years Old”