[ExI] New Hubble Deep Field Photos

[BillK]

The images were taken for a project called the Hubble Deep UV Legacy
Survey, or HDUV, and together they total over 25 total hours of
exposure time! That’s a lot for any telescope, but for Hubble, that’s
deep. They cover about 100 square arc minutes of sky, about the
apparent size of a large grain of sand on the tip of your finger held
at arm’s length. Yet inside that tiny area are the keys to the cosmos.

<https://www.syfy.com/syfywire/hubble-goes-deep-and-finds-thousands-of-galaxies-assembling-when-the-universe-was-young>

<https://www.nasa.gov/feature/goddard/2018/hubble-paints-picture-of-the-evolving-universe>

Quotes:

Astronomers using the ultraviolet vision of NASA’s Hubble Space
Telescope have captured one of the largest panoramic views of the fire
and fury of star birth in the distant universe. The field features
approximately 15,000 galaxies, about 12,000 of which are forming
stars. Hubble’s ultraviolet vision opens a new window on the evolving
universe, tracking the birth of stars over the last 11 billion years
back to the cosmos’ busiest star-forming period, which happened about
3 billion years after the big bang.

Ultraviolet light has been the missing piece to the cosmic puzzle.
Now, combined with infrared and visible-light data from Hubble and
other space and ground-based telescopes, astronomers have assembled
one of the most comprehensive portraits yet of the universe’s
evolutionary history.

The image straddles the gap between the very distant galaxies, which
can only be viewed in infrared light, and closer galaxies, which can
be seen across a broad spectrum. The light from distant star-forming
regions in remote galaxies started out as ultraviolet. However, the
expansion of the universe has shifted the light into infrared
wavelengths. By comparing images of star formation in the distant and
nearby universe, astronomers glean a better understanding of how
nearby galaxies grew from small clumps of hot, young stars long ago.

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Yes, it's a big universe out there!

BillK