A grazing encounter between the Solar System and a passing star could once have changed Earth's orbit enough to wreak havoc on the climate, new research has found. Around 56 million years ago ...

which is not perpendicular to Earth’s orbit. During winter, the North Pole is tilted away from the Sun’s rays. As the Earth travels around the Sun, the tilt gradually causes the northern ...

An international team of scientists has found a fascinating new planetary system around a star similar to our sun. The system ...

Dwarf planet Pluto's highly elliptical orbit around the sun has an eccentricity of 0.25, for context, while the Earth's near perfectly circular orbit has an eccentricity of 0.02. The orbit of TIC ...