An exoplanet is a planet that orbits a star other than our sun. “But the planet is too close to the host star, closer than the habitable zone … even if the star is about 2,500 degrees cooler ...

Narrator: As the solar system grew, four rocky planets: Mercury, Venus, Earth and Mars, were created closest to the Sun. Made of rocks and metals, they have solid surfaces and a central core of ...

Earth, our home planet, is a world unlike any other. The third planet from the sun, Earth is the only place in the known universe confirmed to host life. With a radius of 3,959 miles, Earth is the ...

Four bright planets are conveniently placed for viewing ... Mercury is a -0.2-magnitude "morning star" rising 1.5 hours before the sun. In mid-twilight on the 1st, look 12 degrees to the lower ...

On the scale of galaxies and stars, the planets of our solar system are little more than grains of sand caught momentarily in the light of the Sun. But on those motes of dust, for over four ...

The Sun is the most massive object in our solar system, which means it has the most gravitational influence on objects such as planets. In order for a satellite to orbit a planet, it has to be ...

Planetary oppositions for Jupiter, Saturn, Uranus, and Neptune occur almost annually, as Earth's faster orbit allows it to pass between each of these planets and the sun nearly once a year but ...

Read more: Full Moons Explained, From Blue Moons to Supermoons to Lunar Phases You won't have to wait long for all six planets to be in the sky. They'll be there as soon as the sun sets.