It's 7 billion years ago, and the universe's heyday of star formation is beginning to slow. What might our Milky Way galaxy have looked like at that time? Astronomers have found clues in the form of a cosmic question mark, the result of a rare alignment across light-years of space.
It's 7 billion years ago, and the universe's heyday of star formation is beginning to slow. What might our Milky Way galaxy have looked like at that time? Astronomers have found clues in the form of a cosmic question mark, the result of a rare alignment across light-years of space.
While this region has been observed previously with NASA's Hubble Space Telescope, the dusty red galaxy that forms the intriguing question-mark shape only came into view with Webb. This is a result of the wavelengths of light that Hubble detects getting trapped in cosmic dust, while longer wavelengths of infrared light are able to pass through and be detected by Webb's instruments.
In addition to producing a case study of the Webb NIRISS instrument's ability to detect star formation locations within a galaxy billions of light-years away, the research team also couldn't resist highlighting the question mark shape."This is just cool looking. Amazing images like this are why I got into astronomy when I was young," said astronomer Marcin Sawicki of Saint Mary's University, one of the lead researchers on the team.
"These galaxies, seen billions of years ago when star formation was at its peak, are similar to the mass that the Milky Way galaxy would have been at that time. Webb is allowing us to study what the teenage years of our own galaxy would have been like," said Sawicki.
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