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A large dwarf planet was discovered at the edge of the solar system, is there also a planet the size of the Earth and more hiding there?

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At the time when modern man emerged from the shadows, and the Neanderthals were close to extinction, a double star system passed by the far reaches of the solar system. (Image: Michael Osadciw/University of Rochester)

A star passed through our solar system 70 thousand years ago

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Two objects with comet-like orbits passed through the solar system in 2013 and 2014, but showed no activity. On the left is C/2013 P2 Pan-STARRS and on the right is C/2014 S3 Pan-STARRS. Photo: Institute of Astronomy, University of Hawaii.

"Naked" comets may reveal the secret of the origin of the solar system

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These images taken by the Mars Reconnaissance Orbiter (MRO) are of the nucleus of Comet C/2013 A1 or Siding Spring during the comet's transit near Mars on October 19, 2014. Comet Siding Spring is on its first trip near the Sun and came from the Oort Cloud at the outer edge of the system the sun The image composed of two versions of two of the best photographs of the comet by HiRISE, in the upper part the images from dynamic range, show the nucleus and the bright halo near the nucleus. At the bottom of the image you see two clarified versions of the outer halo, in which the inner area is saturated. The pictures on the left and right were taken nine minutes apart. Photo: NASA/JPL-Caltech/University of Arizona

The nucleus of the Siding Spring comet that passed by Mars is smaller than expected

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A comet is approaching the sun. Image: NASA

Is a giant planet at the edge of the solar system responsible for some of the comets?

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Comet Hale-Bop. Photography: A. Kolmhofer, H. Raab, Johannes Kepler Observatory, Linz, Austria

Many famous comets were probably visitors from outside the solar system

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The orbit of the comets brings them to justice, less endangering the earth

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