Celestial Object Archives - Page 5 of 13 -
Quasars are supermassive black holes located at the center of distant, massive galaxies. They are the brightest objects in the universe, and display a mysterious diversity in their appearance that has puzzled astronomers for over 20 years.
Earth is about to have a close encounter with a house-sized asteroid on Sunday (Sept. 7), when a space rock discovered just days ago will zoom by our planet at a range closer than some satellites.
Mercury is the last of the classical planets, the planets known to the astronomers of Egypt and Greece and Rome and the Far East. It’s an object that has captivated the imagination and the attention of astronomers for millennia.
A comet has a lot to hide. To most people, it’s among the most glamorous objects in the solar system—brilliantly illuminated, racing through space with its glowing tail streaming far behind it.
A year on the newly discovered Uranus-sized exoplanet Kepler-421b lasts for 704.2 days, making it the longest orbital period exoplanet yet found. Its parent star, Kepler-421, is a G9/K0 dwarf star located in the constellation Lyra, about 1,000 light-years from Earth.
Black holes are some of the most amazing cosmological structures in the universe. We are drawn to them. Perhaps this is because they stand as a kind of sublime horror; they are super massive objects that consume entire worlds.
Since the first planet outside of our solar system was discovered in 1994, astronomers have been hunting for an elusive target: a rocky planet roughly the size of the Earth that orbits its star at a distance that would allow liquid water to persist on its surface. In 2010, exoplanet hunters announced that they’d potentially found just such a planet.
A team of astronomers led by John Bochanski has found the farthest stars in our galaxy in the mysterious Milky Way halo, a rare discovery that may change our understanding of the formation of our galactic home.
Vesta, which has a 500km diameter and is located between Mars and Jupiter, is one of the largest known planet embryos and it came into existence at the same time as the Solar System.
You may have noticed the moon looked bigger and brighter than usual this weekend. When the moon is full while its orbit is closest to Earth it’s known as a “supermoon,” creating an illusion of a dramatically large luminous sphere when viewed close to the horizon. This is what occurred over the weekend when the moon was at its fullest and still appeared brighter than normal.