Astronomers have found likely evidence of an Earth-like planet in the Solar System that may be circling the Sun in an orbit beyond Neptune. Physicists, including those from the National Astronomical Observatory of Japan, said the planet could be much closer than the hypothetical Planet Nine thought to exist in the far outer edges of the Solar System. Several studies in the past have suggested there... 

Astronomers have discovered a “celestial highway” to travel through the Solar System much faster than was previously possible. The development raises the prospect of rapidly sending crafts across vast swathes of space. The extraordinary superhighway network was discovered by an international team of researchers from Serbia and the United States. The routes can transport comets and asteroids nearly... 

Size comparison of HAT-P-11b (gray) with Neptune Astronomers have detected water vapor in the atmosphere of an exoplanet, an extrasolar planet, which does not orbit the Sun. The planet is the size of Neptune and about four times the size of Earth. It orbits a star some 130 light years from Earth. HAT-P-11b’s atmosphere was also found to contain copious amounts of hydrogen. Atmospheres are telltales... 

Thanks to archival photographs taken with the help of Hubble telescope, scientists found out that Neptune had 14, not 13 satellites, as was previously believed. The new satellite was discovered by American scientist Mark Showalter of SETI non-profit research institute network that is engaged in the search for extraterrestrial life. The specialist studied more than 150 images taken by the telescope... 

Entering the unknown: This artist’s impression shows how plasma flows around NASA’s Voyager 1 spacecraft as it gets close to entering interstellar space Nasa’s Voyager 1 is on the verge of becoming the first human-made object to enter interstellar space, scientists say. First launched in 1977, the unmanned spacecraft has been in uncharted territory since last year. Scientists had... 

Jumpin' Jupiter: The solar system's largest planet may well have knocked another giant into deep space The consensus among astronomers is that the solar system has always had four giant planets – Jupiter, Saturn, Neptune and Uranus. But now it’s claimed that it’s much more likely to have been home to a mystery fifth giant planet that got knocked out. Computer simulations by David Nesvorny...