Turning down starlight to spot new exoplanets

Researchers have developed a new coronagraph—an optical device that blocks out light from a bright source—that could make it possible to see distant exoplanets obscured by light from their parent stars. The new device could reveal exoplanets beyond our solar system that today’s telescopes cannot resolve, providing insights into the possibility of life beyond Earth.

Astronomers Watch a Black Hole Wake Up in Real Time

You never know when a central supermassive black hole is going to power up and start gobbling matter. Contrary to the popular view that these monsters are constantly devouring nearby stars and gas clouds, it turns out they spend part of their existence dormant and inactive. New observations from the European Space Agency’s XMM-Newton spacecraft opened a window on the “turn on event” for one of these monsters in a distant galaxy.

Mars Has the Remnants of a Lopsided Magnetic Field

Scientists have known for a while that Mars currently lacks a magnetic field, and many blame that for its paltry atmosphere – with no protective shield around the planet, the solar wind was able to strip away much of the gaseous atmosphere over the course of billions of years. But, evidence has been mounting that Mars once had a magnetic field. Results from Insight, one of the Red Planet’s landers, lend credence to that idea, but they also point to a strange feature – the magnetic field seemed to cover only the southern hemisphere, but not the north. A team from the University of Texas Institute for Geophysics thinks they might know why – in a recent paper, they described how a fully liquid core in Mars could create a lopsided magnetic field like the one seen in Insight’s data.

SpaceX launches 10th batch of ‘proliferated architecture’ spy satellites for US government (video)

SpaceX launched the 10th batch of “proliferated architecture” spy satellites for the U.S. National Reconnaissance Office from California’s Vandenberg Space Force Base today (April 20). Continue ReadingSpaceX launches 10th batch of ‘proliferated architecture’ spy satellites for US government (video)

Ghost forests are growing as sea levels rise

Like giant bones planted in the earth, clusters of tree trunks, stripped clean of bark, are appearing along the Chesapeake Bay on the United States’ mid-Atlantic coast. They are ghost forests: the haunting remains of what were once stands of cedar and pine. Since the late 19th century, an ever-widening swath of these trees have died along the shore. And they won’t be growing back. These arboreal graveyards are showing up in places where the Continue ReadingGhost forests are growing as sea levels rise

Gamma-ray bursts reveal largest structure in the universe is bigger and closer to Earth than we knew: ‘The jury is still out on what it all means.’

New research suggests that the largest cosmic structure is even bigger and closer to Earth than we knew. It goes against scientists’ models of cosmic evolution. Continue ReadingGamma-ray bursts reveal largest structure in the universe is bigger and closer to Earth than we knew: ‘The jury is still out on what it all means.’