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Astronomy.com is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes, comets, constellations, eclipses, exoplanets, nebulae, meteors, quasars, observing, telescopes, NASA, Hubble, space missions, stargazing, and more

Astronomy.com is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes, comets, constellations, eclipses, exoplanets, nebulae, meteors, quasars, observing, telescopes, NASA, Hubble, space missions, stargazing, and more

Astronomy.com is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes, comets, constellations, eclipses, exoplanets, nebulae, meteors, quasars, observing, telescopes, NASA, Hubble, space missions, stargazing, and more

Astronomy.com is for anyone who wants to learn more about astronomy events, cosmology, planets, galaxies, asteroids, astrophotography, the Big Bang, black holes, comets, constellations, eclipses, exoplanets, nebulae, meteors, quasars, observing, telescopes, NASA, Hubble, space missions, stargazing, and more

461 Messier 2 is a globular cluster lying 55,000 light-years from Earth in the constellation Aquarius. It is a remarkable globular for several reasons. First, it is one of the largest known globulars with a diameter of 175,000 light-years. Second, it is a Shapley-Sawyer Class II globular, which means it has an extremely dense and bright core. How dense? Photometric measurements indicate that a 1x1 area at its core contributes 37% of its light output. At 5 fro...

739 Messier 2 is a globular cluster lying 55,000 light-years from Earth in the constellation Aquarius. It is a remarkable globular for several reasons. First, it is one of the largest known globulars with a diameter of 175,000 light-years. Second, it is a Shapley-Sawyer Class II globular, which means it has an extremely dense and bright core. How dense? Photometric measurements indicate that a 1x1 area at its core contributes 37% of its light output. At 5 fro...

315 Messier 106 is a spiral galaxy lying 22 million light-years from Earth in the constellation Canes Venatici. It is a Seyfert galaxy with an active nucleus emitting radio waves and X-rays due to presence of a supermassive black hole actively consuming matter within its core. Violent churning of spiral arms, dust clouds, and sprays of ionized hydrogen can be seen revolving around the nucleus. The the irregular galaxy to its lower left is UGC7356 which lies a...