Though our solar system and the movement of its planets appear relatively sedate, there are many things that could upset the ...

Astronomers manning an asteroid warning system caught a glimpse of a large, bright object zipping through the solar system ...

How does a 15-kilometer-wide comet, moving at 152,000 miles per hour, slip into our solar system undetected until a global ...

Earth’s orbit around the Sun is not circular, but an ellipse. The perimeter of Earth’s orbit is roughly 584 million miles (940 million km).

Pluto, for example, has a highly elongated orbit compared to the planets in our solar system and has an orbital eccentricity of 0.25. Earth has an orbital eccentricity of just 0.02.

How do we know 3I/ATLAS, also called comet C/2025 N1 (ATLAS), is interstellar? Will it strike Earth? Can we visit it? Here ...

"Astronomers may have just discovered the third interstellar object passing through the Solar System!" the agency's ...

Astronomers may have solved the mystery of how hot Jupiter exoplanets are born, finding a gas giant with a weird orbit in the process of transforming into just such a world.

I SHALL feel obliged if some of your correspondents would inform me if, with the exception of Grant's Physical Astronomy, there is any treatise or encyclopædic article on Astronomy, published in ...

HD 80606 b has an eccentricity of 0.93 and a shorter orbit of 111 days, and it orbits in the same direction of its star. But otherwise, the planets are practically twins, Wright said.

The findings highlight the roles of precession, obliquity, and eccentricity – factors influencing the tilt and movement of Earth's axis, and the shape of Earth's orbit around the Sun – in ...

The eccentricity of a planet's orbit is measured on a scale from 0 to 1, with 0 being a perfectly circlular orbit and 1 being highly elliptical.