A11pl3Z's eccentricity is now estimated to be near 6.0, the highest seen yet, confirming its hyperbolic orbit.

There are dozens of enormous armless galaxy clusters called elliptical galaxies in the Plane, but not nearly as many disk-shaped galaxies with spiral arms.

Although hundreds, or perhaps thousands, more solar system bodies may eventually join the list, the IAU officially recognizes just five dwarf planets at the moment.

You’ll have to assume that the orbits you want to travel between are circular (most solar system orbits are at least a little elliptical) and that they travel around our the sun on the same flat plane ...

But by tilting its orbit to 17 degrees below the equator, the ESA's solar orbite r has managed to reveal a side of our home star that has never been seen before.

There’s probably another planet in our solar system Laying out two decades of evidence for the mysterious “Planet 9,” a team of astronomers predicts that if it exists, it’s likely to be ...

As the closest planet to the Sun, Mercury is exposed to the star's enormous gravitational field. And it's really stressful.

A simulation-based study suggests there may have been another gas giant that went missing as the solar system evolved ...

This could involve the unprecedented launch of polar orbiter observational satellites outside the elliptical plane of the Solar System. Story Source: Materials provided by University of Sydney.

Astronomers have spotted the second object ever known to visit our solar system from another star system. The object is expected to fly near Mars in October. The International Astronomical Union ...

Artist Ron Miller takes us on a journey to eight of the most breathtaking views that await intrepid explorers of our solar system. The scale of these natural wonders dwarfs anything Earth has to ...

Although hundreds, or perhaps thousands, more solar system bodies may eventually join the list, the IAU officially recognizes just five dwarf planets at the moment.