The findings suggest that there are many more targets of opportunity for locating potentially habitable worlds across our ...

Simpson explained, “If it’s one or two Earth masses, which is still a pretty big planet, our inner ... this hypothetical ...

An elusive Earth-like planet in our solar system could finally be discovered within the next few years. Known as Planet Nine or Planet X, it is a hypothetical planet that has long been rumoured to ...

While hypothetical ... More information: Emily Simpson et al, How might a planet between Mars and Jupiter influence the inner solar system? Effects on orbital motion, obliquity, and eccentricity ...

Floating around at the edge of the Solar System are leftovers from its formation. This is the Kuiper Belt, which is composed of chunks of rock and ice like comets, dwarf planets, and random objects ...

The inner four planets (Mercury, Venus, Earth, and Mars) are rocky and have solid surfaces that can be walked on. When the solar system formed, rocks (and other dense, heavy materials in the dust ...

Astronomers have discovered two new exoplanets that are similar to other worlds found in the Milky Way, but are unlike any in our own solar system ... orbits of the inner planet, the outer ...

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 fifth largest planet in our solar system ...