A new study suggests the Sun moved outward with many similar stars during a large Milky Way migration event long ago.

Over 4 billion years ago, as planets were coalescing around the newborn Sun, our star may have gone on an epic road trip across the Milky Way along with thousands of stellar "twins." And we may owe ...

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If I were on Mars, how often would I see Earth transit the Sun? Steven RiserConyers, Georgia From Mars, Earth transits the Sun four times in a 284-year cycle. The transits occur in either May or ...

A meteor streaks across the sky and burns up in a flash. Sometimes, a small piece survives the journey through Earth’s atmosphere and lands as a meteorite. Scientists have studied these fallen rocks ...

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Earth's shadow follows the planet as it orbits the sun. You can get a sense of its enormous, awe-inspiring size by seeing ...

Earth’s orbit around the Sun isn’t a perfect circle—it’s slightly elliptical. Each year, around July 2 or 3, Earth reaches its farthest point from the Sun, known as aphelion. Around January 2 or 3, ...

This event, known as aphelion, happens once per year typically around two weeks after the summer solstice in June. Although the Earth’s distance from the Sun does not affect the seasons, aphelion does ...

On Jan. 31, 1958, Explorer 1 became the first satellite launched by the United States. Its primary science instrument, a cosmic ray detector, was designed to measure the radiation environment in Earth ...