Powered by laser light, this tiny sail lays the groundwork for future advances in lightsail technology and the potential for ...

As China's significant investments in its commercial space sector have raised concerns about technological competition, the Department of Defense ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

"Chemical rockets that we use today, even with the extra speed boost from flying by planets, or from swinging by the sun for ...

A new study suggests that a planet-sized object may have passed through the solar system billions of years ago. Its journey could have permanently altered the orbits of the outer planets.

An interstellar visitor To tackle this puzzle, Malhotra and colleagues considered a less-examined scenario: that a visiting star-size object tweaked these planets' paths around 4 billion years ago.

The H and He spectra have the same energy dependence between 3 and 346 MeV nuc-1, with a broad maximum in the 10-50 MeV nuc-1 range and a H/He ratio of 12.2 ± 0.9. The peak H intensity is ˜15 times ...

This groundbreaking observation has enabled astronomers to create accurate 3D maps of the interstellar medium for the first time. The initial findings offer novel perspectives on the relationship ...

"This is going to completely change the way we think about the foundations of the cold interstellar medium," Josh Peek, an astronomer at the Space Telescope Science Institute in Maryland ...

The Milky Way's interstellar medium—that is, the dust and gas that threads between our galaxy's billions of stars—is an abundant yet elusive material. That means the latest image from NASA's ...