Mercury is the closest planet to the sun, followed by Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Mercury orbits ...

Worlds with liquid water could have formed just 200 million years after the big bang from the remains of the earliest ...

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

New James Webb Space Telescope observations of a star cluster called NGC 346 are shedding light on how, when and where ...

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 ...

The planets will form an arc (not a straight line ... This arc is known as the ecliptic—the plane on which the planets orbit the Sun. From our viewpoint on Earth, they don’t appear perfectly ...

The planets will form an arc (not a straight line) stretching from the west-southwest sky (to the right) to the southeast sky (to the left. This arc is known as the ecliptic—the plane on which the ...

Certain extreme planets are called ultra-short period objects if they're very close to their stars and orbit them in mere hours, like K2-22b.

As added attraction, the cosmic pair will form a visually impressive ... By mid March the planets will begin to disband, some becoming hidden by the sun’s glare while others enter the early ...