An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Astronomers may have discovered a scrawny star bolting through the middle of our galaxy with a planet in tow. If confirmed, ...

Our modern era of space observation and exploration deepens our connection with the universe—and with each other. When NASA ...

15, 2025 — New observational data and simulation models have confirmed a new type of planet unlike anything found in the Solar System ... artifacts of human exploration on Mars deserve ...

Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

Astronomers discovered the gas giant planet — dubbed a "hot Jupiter " — in 2016, but have continued to investigate this ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

NASA’s Voyager mission completed humankind’s first close-up exploration of the four giant outer planets of our solar system.

The organic ingredients to life, hints to where Earth’s water came from, and the fundamental building blocks of our planet ...

Almost a decade after its controversial launch nearly killed any prospects at long-term success, No Man's Sky is gearing up ...