The age of the universe is about 13.75 billion years. The diameter of the observable universe is estimated at about 28 billion parsecs (93 billion light-years). As a reminder, a light-year is a unit of length equal to just under 10 trillion kilometres (or about 6 trillion miles).
The Observable Universe consists of the galaxies and other matter that we can, in principle, observe from Earth in the present day—because light (or other signals) from those objects has had time to reach the Earth since the beginning of the cosmological expansion.
Jupiter Icy Moons Orbiter (from James Cameron’s Aliens of the Deep)
Amazing Alien Planets That Could Host Life
Voyager Images from the Odysseys (NASA Space Photos)
A 3D Atlas Of The Universe – Carter Emmart
Welcome to Mars Trek
Mars Trek is an application that allows you to view imagery and perform analysis on data from the planet Mars.
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