The Spectro-Photometer for the History of the Universe, Epoch of Reionization and Ices Explorer, nicknamed SPHEREx, is expected to launch in 2023 and has been funded at $242 million — not including launch costs.
“This amazing mission will be a treasure trove of unique data for astronomers,” said Thomas Zurbuchen, associate administrator for NASA’s Science Mission Directorate. “It will deliver an unprecedented galactic map containing ‘fingerprints’ from the first moments in the universe’s history. And we’ll have new clues to one of the greatest mysteries in science: What made the universe expand so quickly less than a nanosecond after the big bang?”
SPHEREx will use near-infrared light, as well as optical, to survey the sky every six months and collect data from more than 100 million stars in the Milky Way, as well as 300 million galaxies. These are galaxies in our cosmic neighborhood along with some that are so distant, it’s taken 10 billion years for their light to reach our telescopes.
The technology used to create SPHEREx has been adapted from what is used on our satellites and Mars spacecraft, NASA said in a statement.
The mission’s result should create a sky map using 96 varied color bands with more resolution than any previous sky maps. And like other NASA missions, SPHEREx can also help identify targets for upcoming missions such as the James Webb Space Telescope.
“I’m really excited about this new mission,” NASA Administrator Jim Bridenstine said in the statement. “Not only does it expand the United States’ powerful fleet of space-based missions dedicated to uncovering the mysteries of the universe, it is a critical part of a balanced science program that includes missions of various sizes.”