The planets Mercury ... have two areas of maximum density. The inner region, consisting largely of protons with an energy greater than 30 million eV, is centered about 3,000 km above Earth’s surface.

The shortening factor depends on characteristics of both gears ... The worm shown above is a cylindrical worm, which is the most common type. It is possible to design the worm to follow the curved ...

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

Exoplanets have captured the imagination of the public and scientists alike and as the search continues for more, researchers ...

New research has revealed that Hot Jupiters do not always push away or destroy nearby planets during their migration. This ...

A super-Earth planet that dips in and out of its star's habitable zone has been discovered just 19.7 light-years away.

Kepler was one of the most successful exoplanet-hunting missions so far. It discovered 2,600 confirmed exoplanets—almost half ...

The planets are lining up, forming a rare and special parade across the night sky in January and February. Four planets — Venus, Saturn, Jupiter, and Mars — are bright enough to see with the ...

Uranus and Neptune, the outer planets, can be viewed through binoculars or a basic telescope. Six planets? That’s impressive. And there is more to come. “You can start observing Venus and ...

From January to March, the night sky will host a spectacular parade of planets featuring Venus, Mars, Jupiter, Saturn, Uranus, and Neptune. The alignment peaks on January 25 and Mercury joins the ...

The NASA/ESA Hubble Space Telescope completed its annual grand tour of the outer Solar System for 2021, including Jupiter, Saturn, Uranus, and Neptune. Note: The planets are not shown to scale in ...