Death Valley National Park is a remote place, and in its night sky countless stars, including many in our own Milky Way Galaxy, are visible. But on the park’s eastern horizon, a dome of light appears each night, blotting out stars in that part of the sky. The glow of city lights from Las Vegas creates this “light pollution,” which worldwide now hides the Milky Way from about one-third of humanity, according to a new study in Science Advances.
Rosetta crashed onto the surface of a comet on Sept. 30, bringing its mission to an end, though the scientific analysis and discoveries will continue for decades. We examine a few of the biggest surprises and highlights of Rosetta’s scientific journey so far.
All of the names associated with the Rosetta mission, including the orbiter itself, the lander and all of the place names coined by mission scientists on 67P, refer to ancient Egyptian sites or deities, in homage to the Egyptian origin of the Rosetta Stone and Philae obelisk.
Rosetta’s Philae lander made the first landing on the surface of a comet when it touched down on Nov. 12, 2014, three months after Rosetta began orbiting 67P. The landing, though historic, did not go as planned, and Philae was unable to accomplish much of the scientific program that had been scheduled for its 10 instruments.
Earth has a companion other than the moon, according to scientists at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, Calif., who identified a previously unseen asteroid that circles around our planet as it follows its own orbit around the sun.
With two rovers patrolling the surface of Mars, five spacecraft orbiting above it, and scientists here on Earth studying the Red Planet from afar, new findings are announced often. Here are a few of the latest updates.
Mercury’s surface is arid, gray and scarred by craters over much of its landscape. Given its close proximity to the sun, a manned trip to Mercury is out of the question — but now you can explore Mercury’s pockmarked surface in its entirety with the first global topographic map of the planet.
Jupiter’s innermost moon, Io, is home to some of the strangest mountains in our solar system: towering isolated peaks, some more than 8,000 meters tall, that jut from the moon’s surface with little evidence of underlying tectonics. Now, a new model may explain how Io’s odd peaks formed.
At the end of a star’s lifecycle it collapses and explodes into a supernova, spewing rare elements and isotopes outward into space. In the last 1,000 years, three supernova events have been observed in the Milky Way Galaxy. Now scientists have detected a rare iron isotope, iron-60, in our solar system that hints that a supernova may have exploded nearby within the last few million years.