"In about 1604, Johannes Kepler fitted an ellipse model of Mars' orbit to observations of Mars," Bloomer told Space.com. "He came up with the first law of planetary motion that states that planets ...

While this model works well for large, hot planets, it falls short when applied ... Their wide, circular orbit also implies a formation scenario that preserved substantial angular momentum.

Earth's unusual orbit through hot and cold conditions tests the limits of tolerability for any known lifeforms.

Recent studies have revealed that, until now, Hot Jupiters seem to be the only planet in orbit around their host star. This ...

An international team, including researchers from UNIGE and NCCR PlanetS, has discovered a super-Earth, referred to as HD ...

They developed a 3D model that simulates how the solar ... a planet tilts on its axis—and eccentricities—how much a planet's orbit deviates from a true circle. Obliquity influences the ...

The planet, known as HD 20794d, gets farther out from its star than Mars is from the sun and, on the other end of its orbit, as close as Venus. Each orbit the planet begins out beyond the ...