NASA's Hubble Space Telescope has sent back images that scientists call “baby pictures” of the universe.
The pictures released Wednesday show seven galaxies said to have been formed shortly after the Big Bang, which gave birth to the universe more than 13 billion years ago.
NASA says one of the seven galaxies may be the oldest ever seen.
A galaxy is a vast cluster of stars formed when hydrogen comes under enormous pressure from gravity.
NASA says Hubble's discovery will help scientists answer questions about what they call the “cosmic dawn,” the time when the first stars appeared after the Big Bang.
Scientists are not certain if the “cosmic dawn” was something gradual or one large event. But they do say it was the start of all the elements that eventually led to life on Earth.