For the first time, the NASA/ESA/CSA James Webb Space Telescope has detected and "weighed" a galaxy that not only existed about 600 million years after the Big Bang, but also has a mass that is similar to what our Milky Way galaxy's mass might have been at the same stage of development.

WASHINGTON (Reuters) - NASA's James Webb Space Telescope has spotted a young galaxy dating to the early universe - called Firefly Sparkle because its gleaming star clusters resemble the bioluminescent bugs - in a discovery that is giving astronomers a peek at what our Milky Way may have looked like in its infancy.

Why is your discovery of the Firefly Sparkle galaxy important? Telescopes like JWST are essentially time machines. Since light from distant galaxies travels for a long time before it reaches our telescope,

A Canadian-led project peers back 13 billion years, giving science its first look at the birth of something resembling the Milky Way