Comet, Meteor or Alien Spacecraft

Since its first sighting in 2017, “Oumuamua” has puzzled scientists and researchers. Its strange propulsion-like movement and determined trajectory call into question whether the long, flat object is merely a comet or a meteorite—despite that being the more mundane, and maybe likely, conclusion. The way the object sped up as it passed the sun has researchers most puzzled. “Lightsails,” the solar-powered starships that Breakthrough Starshot plans …

Neptune-Sized Moon Discovered Outside Our Solar System

Some 8,000 light-years away, a moon has been discovered—possibly the first one outside our own solar system. Dubbed an “exomoon,” the “Neptune-sized” gassy object, which orbits a “Jupiter-sized” planet, was spotted by Columbia University astronomers via the Kepler and Hubble space telescopes. It’s “unlike anything scientists have seen before, and even if this turns out to be a false find, the experience has offered valuable insight on …

How the Parker Space Probe Will Avoid Melting When It Reaches the Sun

As Popular Mechanics points out, there is a difference between temperature and heat—though they’re often seen as interchangeable on Earth. In the sun’s corona, its outer layer, temperatures hover in the millions of degrees in temperature, but “the loose organization of plasma in the corona makes the heat manageable.” NASA’s Parker Space Probe will enter the corona with a heat shield composed of a unique …