This isotope is found at a ratio of about one per 2,500 helium-4 ions, the latter being the common version of helium.

Over 4.6 billion years ago, Earth took shape from a spinning cloud of dust and gas surrounding the young sun. Tiny particles ...

In a breakthrough that could reshape future lunar exploration, NASA researchers have confirmed that the solar wind—a stream ...

Only when the moon, Earth and the sun are perfectly aligned is the moon ... Using magnetic levitation technology, the realistic globe will project "moonlight" as it floats and spins in mid-air.

April’s pink “micromoon” will appear smaller than other full moons this year as it nears its farthest point from Earth in its ...

Multiple spacecraft captured the moon's shadow sweeping across North America at more than 1,500 mph during the 2024 total ...