Is there an end to the universe?
The end result is unknown; a simple estimation would have all the matter and space-time in the universe collapse into a dimensionless singularity back into how the universe started with the Big Bang, but at these scales unknown quantum effects need to be considered (see Quantum gravity).
How long will the universe exist?
Assuming that dark energy continues to make the universe expand at an accelerating rate, in about 150 billion years all galaxies outside the Local Supercluster will pass behind the cosmological horizon. It will then be impossible for events in the Local Group to affect other galaxies.
How can the universe be flat?
The intricate balance between the expansion rate and the total density in the Universe is so … A Universe with too much matter-and-energy for its expansion rate will have positive curvature, while one with too little will have negative curvature. Only the perfectly balanced case will be flat.
What is the Black Hole Era?
The Black Hole Era is defined as “40 < n < 100”. In this era, according to the book, organized matter will remain only in the form of black holes. Black holes themselves slowly “evaporate” away the matter contained in them, by the quantum mechanical process of Hawking radiation.
How many planets are there in the universe?
10,000,000,000,000,000,000,000,000 planets
How many planets are in our galaxy?
The Milky Way contains at least one planet per star, resulting in 100–400 billion planets, according to a January 2013 study of the five-planet star system Kepler-32 with the Kepler space observatory.
Can we see planets in other galaxies?
An extragalactic planet, also known as an extragalactic exoplanet, is a star-bound planet or rogue planet located outside of the Milky Way Galaxy. Due to the huge distances to such worlds, they would be very hard to detect directly. However, indirect evidence suggests that such planets exist.
Which is the biggest galaxy in the universe?
IC 1101
What other planet can support life?
A 2015 review concluded that the exoplanets Kepler-62f, Kepler-186f and Kepler-442b were likely the best candidates for being potentially habitable. These are at a distance of 1,200, 490 and 1,120 light-years away, respectively.
Which planet is easiest to terraform?
Mercury
How many humans have visited the moon?
Twelve people
How many natural satellites does the moon have?
Of the inner planets, Mercury and Venus have no natural satellites; Earth has one large natural satellite, known as the Moon; and Mars has two tiny natural satellites, Phobos and Deimos.
How long is a year on Pluto?
248 years
How long is a rotation on Pluto?
6.4 days