An artist’s impression of a small, rocky interstellar object hurtling from the upper right toward the inner solar system. The orbits of the four inner planets (Mercury, Venus, Earth, Mars) are ...

A new study claims it is possible an "alien visitor" could have warped our solar system during its earliest years.

However, it was not until Kepler's observations that the planets followed elliptical orbits around the sun (rather than circular orbits) that astronomical models matched observations of the ...

HD 20794 d completes its orbit just shy of two Earth years, placing it well within reach of conditions that might harbor life ...

This may explain the strange properties of the orbits of our solar system's planets, which are not quite perfectly circular, and all lie on slightly different planes. NASA artist’s conception of ...

All must, then, be regarded as having always been members of the solar system, however much their orbits may have changed ... of the viscosity with the time. Scientific Papers, vol.

A planet-size object that possibly once visited the solar system may have permanently changed our cosmic neighborhood by warping the orbits of the ... life Using computer models of the four ...

ANDES stands for ArmazoNes high Dispersion Echelle Spectrograph. AndES is a high-resolution instrument that can search for ...

Ever since Isaac Newton famously talked about gravity, its dominance as a force in our solar system has been well known. It's ...

The Sun is the largest object in the Solar System. The Sun's huge gravitational ... for example, Mercury orbits once every 88 Earth days, but Neptune orbits once every 165 Earth years For a ...

This means that objects in small orbits travel faster than objects in large orbits. The graph shows how the orbital speed of a planet changes with its distance from the Sun. Geostationary close ...