Researchers report the discovery of a Saturn-sized exoplanet orbiting two M-dwarf stars, which are smaller and cooler than ...

Earth is on an orderly path around the sun, orbiting in nearly the same plane as our star’s equator. In 2008, however, astronomers began finding worlds in other solar systems that sail far above and ...

Online travel agency Orbitz will soon find itself under the microscope again. As part of the transportation spending bill signed by President Bush on Tuesday, Congress has called on the Department of ...

LEO, GEO, L2, SSO—oh my! The many types of useful orbits can get complicated fast, but our handy guide will help you make sense of it all. Reading time 1 minute Nearly 140 rockets have flown to space ...

The planets of our solar system all orbit the Sun within a few degrees of a flat plane extending out from our star’s equator — its equatorial plane. That makes sense. Our solar system began as a ...

Orbitz, the new online travel agency that's backed by five major airlines, officially launched on June 4, prompting a wave of scrutiny and controversy that has become ...

Strange giant planets known as hot Jupiters, which orbit close to their suns, got kicked onto their peculiar paths by nearby planets and stars, a new study finds. After analyzing the orbits of dozens ...

I booked a Condor Airlines flight from Portland to Frankfurt through Orbitz for my family. Orbitz’s website explicitly listed the fare as Economy Classic, which included one free 70-pound checked bag ...

The original version of this story appeared in Quanta Magazine. In October, a Falcon Heavy rocket is scheduled to launch from Cape Canaveral in Florida, carrying NASA’s Europa Clipper mission. The $5 ...

Here’s a trick question: How many moons does Earth have? And to be clear, I mean natural satellites, not human-made ones. I remind you, this is a trick question. The answer is one—the moon. See?