Using the most comprehensive set of telescope observations ever
assembled, astronomers found that the universe is dying.
By studying such a large data set — over 200,000 galaxies in 21
different wavelengths, or colors of light, from ultraviolet to infrared
— astronomers compared the energy emissions from galaxies across a
wide swath of space and time to read the history of the universe.
In August, the international team revealed that the universe is
winding down, with the galaxy population producing twice as much
energy 2 billion years ago compared with today. Interstellar dust
is also piling up, working to dim the universe’s starlight. This falls
in line with many predictions that the energy of the cosmos will
slowly fade to heat within many billions of years, then cold, empty
darkness. Don’t worry, though: Our sun will burn out long before the
rest of the universe.