The relative size of the inner planets of our solar system: Mercury, Venus, Earth and Mars. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert!

Watch this video to find out more about the Earth, planets in our Solar System and other planets far ... Probes are space crafts with cameras to send images back to Earth. This allows us to ...

The first two weeks of March provide a great opportunity to sight four bright naked-eye planets ... solar conjunction on March 12. Earth will pass through the plane of Saturn's ring system on ...

Getty Images The different orbital speeds of the planets in our Solar System means several of them can occasionally line up in the same part of the sky at the same time (Credit: Getty Images ...

That path is called the ecliptic, and it exists because all planets in our solar system orbit around the sun on roughly the same plane. You may like Watch 'planetary parade' online for free on Jan ...

Extrasolar planets contextualise the Solar System among a large number of planetary systems with very different properties. Many extrasolar planets show characteristics which are not realised in the ...

A European-Japanese spacecraft has beamed back some of the best close-up photos yet of Mercury's north pole as part of only the second human survey of our solar system's innermost planet.