If galaxies could talk, we’d want to ask for this galaxy’s skincare routine!
Meet I Zwicky 18, a galaxy lying 60 million light-years away in the constellation Ursa Major.
The bluish-white knots in the center are regions where stars are forming at a rapid rate. These large hubs of stellar creation and the lack of heavy elements in the surrounding gas caused astronomers to think that this dwarf irregular galaxy was very young, since it resembles galaxies in the early universe.
However, the Hubble Space Telescope revealed that I Zwicky 18 is more mature than it first appears. Hubble found faint, older stars within the galaxy, indicating that I Zwicky 18 has been forming stars for more than a billion years.
Credit: NASA, ESA, A. Aloisi (Space Telescope Science Institute and European Space Agency).
ALT TEXT: A bright white and blue oval-shaped area takes up most of the view and is largely centered. Cloud-like wisps of blue material surround the bright-white center, forming a fluffy wreath-like shape. The fluffy material begins as light blue near the center and gradually darkens moving outward. Stars, seen as many bright white and yellow small points of light, are densely grouped in the white and light blue region, forming two roughly circular clumps, one in the upper left and one in the lower right. The corners of the image are dark and mostly empty, with a few larger, fuzzy yellow points of light scattered infrequently throughout.
So gorgeous! Here's the NASA article to go with the pic.
Christmas Tree Cluster
NASA
Handy direct image addresses:
Wow - was also an APOD!
Did a reverse image search on the 2nd one to find the original original source. I found some book covers, but eventually this esahubble.org press release revealed itself as at least an official source of the original image from Nov. 2005! It's NGC 346 (the star cluster) and a gorgeous backdrop of gas in the Small Magellanic Cloud.
Sources for banner and profile picture
Shakespeare in Space Image Credit: NASA, ESA, CSA, STScI
Explanation: In 1986, Voyager 2 became the only spacecraft to explore ice giant planet Uranus close up. Still, this newly released image from the NIRCam (Near-Infrared Camera) on the James Webb Space Telescope offers a detailed look at the distant world. The tilted outer planet rotates on its axis once in about 17 hours. Its north pole is presently pointed near our line of sight, offering direct views of its northern hemisphere and a faint but extensive system of rings. Of the giant planet’s 27 known moons, 14 are annotated in the image. The brighter ones show hints of Webb’s characteristic diffraction spikes. And though these worlds of the outer Solar System were unknown in Shakespearean times, all but two of the 27 Uranian moons are named for characters in the English Bard’s plays.
∞ Source: apod.nasa.gov/apod/ap231229.html
Mare Cognitum ("The Sea that has Become Known") with Kuiper crater at the center // l'AstroVan
Mare Cognitum ("The Sea that has Become Known") is the landing sites of several lunar missions. Ranger 7 (1964) impacted here after its mission was finished; Surveyor 3 (1967) and Apollo 12 (1969) landed near its northern shore; and Apollo 14 (1971) landed near this mare as well.
Kuiper crater is named after the Dutch-American astronomy Gerard Kuiper (1905-1973), the father of modern planetary science
Pumpkin space latte, anyone? ☕
Hubble captured this festive array of stars, Terzan 12, found in the Milky Way about 15,000 light-years from Earth. The stars in this cluster are bound together by gravity in a sphere-like shape and are shrouded in gas and dust. As the starlight travels through that gas and dust to Earth, blue light scatters, leaving the redder wavelengths to come through.
Download the full-resolution image here.
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Wed. 4/16: Check back for our weather decision after 4 pm! The forecasts disagree.
Rosette Nebula by space.by.jase
Our supply of eclipse glasses is running very low.
We'll be open April 8th for the eclipse, too, with solar filters and projections of the Sun. Find us at Bridgewater State University's Science and Mathematics Center.
IC 2118: The Witch Head Nebula Image Credit & Copyright: Abdullah Alharbi
Explanation: Does this nebula look like the head of a witch? The nebula is known popularly as the Witch Head Nebula because, it is said, the nebula’s shape resembles a Halloween-style caricature of a witch’s head. Exactly how, though, can be a topic of imaginative speculation. What is clear is that IC 2118 is about 50 light-years across and made of gas and dust that points to – because it has been partly eroded by – the nearby star Rigel. One of the brighter stars in the constellation Orion, Rigel lies below the bottom of the featured image. The blue color of the Witch Head Nebula and is caused not only by Rigel’s intense blue starlight but because the dust grains scatter blue light more efficiently than red. The same physical process causes Earth’s daytime sky to appear blue, although the scatterers in planet Earth’s atmosphere are molecules of nitrogen and oxygen.
∞ Source: apod.nasa.gov/apod/ap231004.html
STEM Education, Astrophysics Research, Astrophotography, and Outreach located at 24 Park Ave., Bridgewater MA. You'll find us on the two outdoor balconies on the 5th floor, and you'll find our official website here: https://www.bridgew.edu/center/case/observatory .
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