A team of astronomers at the University of Milano-Bicocca has uncovered a colossal spiral galaxy that existed just 2 billion ...

GS-z13-1, marks the earliest sign yet spotted of the era of cosmic reionization at 330 million years after the Big Bang.

The planets offer exciting views in April for both night owls and early risers. Plus, the Lyrid meteor shower peaks in ...

I pick out North America’s celestial highlights for the week ahead (which also apply to mid-northern latitudes in the ...

Ganymede, Jupiter's largest moon and the solar system's largest, is bigger than Mercury and the dwarf planet Pluto, with a diameter of 5,268 kilometers.

A century ago, Edwin Hubble revolutionized our understanding of the universe by proving that the Milky Way is just one of ...

Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

Plus: Observe two stunning spirals, see Venus reappear as a morning star, and enjoy the Last Quarter Moon in the sky this ...

If you want vast ocean views, Jupiter’s biggest moon Ganymede is the place to be. The moon is larger than Mercury and would be classed as a planet if it were orbiting the Sun rather than Jupiter.

So then, why does the moon appear bigger sometimes? The answer may have more to do with you, and where the moon is hanging in the sky, than the moon itself. Keep reading to learn more about the size ...

"The simplest definition [of a moon] would be an object that is in an orbit around a larger, non-stellar object ... Objects smaller than a few hundred feet, often referred to as "ring moons ...

The worm moon will arrive on March 14, 2025, according to NASA. Spring is just around the corner, and with it comes the worm moon -- a celestial sign that winter is fading. Keep reading to find ...