Is there a mirror universe?
The Mirror Universe is a parallel universe in which the plots of several Star Trek television episodes take place. It resembles the fictional universe in which the Star Trek television series takes place, but is separate from the main universe.
What is bigger than Milkyway?
The Andromeda Galaxy has a diameter of about 220,000 light-years, making it the largest member of the Local Group at least in terms of extension, if not mass. … The Milky Way and Andromeda galaxies are expected to collide in around 4.5 billion years, merging to form a giant elliptical galaxy or a large lenticular galaxy.
How many Earths are there in the universe?
On November 4, 2013, astronomers reported, based on Kepler space mission data, that there could be as many as 40 billion Earth-sized planets orbiting in the habitable zones of Sun-like stars and red dwarf stars within the Milky Way galaxy. 11 billion of these estimated planets may be orbiting Sun-like stars.
How big is the universe?
While the spatial size of the entire Universe is unknown, it is possible to measure the size of the observable universe, which is currently estimated to be 93 billion light-years in diameter.
What is the biggest black hole in the universe?
The largest supermassive black hole in the Milky Way's vicinity appears to be that of M87, at a mass of (6.4±0.5)×109 (c. 6.4 billion) M ☉ at a distance of 53.5 million light-years.
What is the largest galaxy known to man?
IC 1101 is a supergiant elliptical galaxy at the center of the Abell 2029 galaxy cluster and is one of the largest known galaxies. Its halo extends about 600 kiloparsecs (2 million light-years) from its core, and it has a mass of about 100 trillion stars.