"The extraordinary results are an essential step toward understanding the initial conditions that lead to the formation of ...

How Many Planets Are There in the Solar System? There are 8 planets in our solar system. The planets orbit the Sun in ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory ...

The Hubble Space Telescope time-lapse captured footage of Jupiter, Saturn, Uranus and Neptune. Credit: SCIENCE: NASA, ESA, ...

Modern astronomy is giving us unprecedented ... These ancient swarms, which orbit the sun alongside the giant planet, may hold clues to the solar system’s original layout. Photograph by PATRICK ...

Earth’s companion has allowed astronomers to define lunar cycles, navigate without technology, and understand celestial ...

NASA’s original mission plan for Spirit called for the rover to last 90 sols (solar days on Mars) and to drive a total of 0.4 miles. Spirit actually operated for ...

An object about 700 kilometers wide has been detected in the frigid region of the Solar System that might qualify as a dwarf planet. A dwarf planet is a type of celestial body in our solar system that ...

The researchers called it one of the most distant visible objects in our solar system, and said its existence indicates that a vast expanse of space beyond the outermost planet Neptune and a region ...