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This year, the beloved Hubble Space Telescope turned 30. Launched in 1990, it has been instrumental in helping us understand the expansion of the universe and has allowed us to peer out at objects far beyond our solar system.
Now, NASA has updated its Hubble Caldwell catalog, a collection of some of the most beautiful images Hubble has captured throughout the years. The Caldwell catalog project, which began in 1995, was a list originally compiled by astronomer Sir Patrick Caldwell-Moore as an addition to the traditional Messier catalog which lists astronomical objects that can be seen in the sky. The Caldwell catalog contains 109 objects including galaxies, nebulae, and star clusters which are visible to amateur astronomers.
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For astronomers who want to refer to highly detailed images of the objects they’re observing, or simply for those who love to enjoy stunning images of space, the Hubble Caldwell catalog shows all of these objects in exquisite detail, as well as a map of where in the night sky each is located.
We’ve shared some of our favorite additions to the catalog below, which include dusty nebulae, distant galaxies, and bright star clusters:
This stunning image captures a small region on the edge of the inky Coalsack Nebula, or Caldwell 99.NASA, ESA, and R. Sahai (Jet Propulsion Laboratory); Processing: Gladys Kober (NASA/Catholic University of America)Caldwell 72, also known as NGC 55, is a galaxy located 6.5 million light-years from Earth in the constellation Sculptor.NASA, ESA, R. de Jong (Leibniz-Institut fur Astrophysik Potsdam [AIP]), and G. Illingworth (University of California – Santa Cruz); Processing: Gladys Kober (NASA/Catholic University of America)Caldwell 29, also known as NGC 5005, is a spiral galaxy that likely harbors a supermassive black hole at its heart.NASA, ESA, and L. Ho (Peking University); Processing: Gladys Kober (NASA/Catholic University of America)This beautiful Hubble image captures the core and some of the spiral arms of the galaxy Caldwell 36. Also known as NGC 4559, this spiral galaxy is located roughly 30 million light-years from Earth in the constellation Coma Berenices.NASA, ESA, and S. Smartt (The Queen's University of Belfast); Processing: Gladys Kober (NASA/Catholic University of America)Galaxies consist of a number of different structures, and the particulars of these structures drive the evolution of a given galaxy. One such structure in spiral galaxies like Caldwell 40 (or NGC 3626) is the galactic bulge. This structure is a densely packed region of stars that encompasses the heart of a spiral galaxy.NASA, ESA, and P. Erwin (Max Planck Institute for Extraterrestrial Physics); Processing: Gladys Kober (NASA/Catholic University of America)Caldwell 45, or NGC 5248, is a spiral galaxy located in the constellation Boötes, and it is notable for the ring structure around its nucleus.NASA, ESA, J. Lee (California Institute of Technology), and A. Filippenko (University of California – Berkeley); Processing: Gladys Kober (NASA/Catholic University of America)This Hubble image captures Caldwell 78 (or NGC 6541), a globular star cluster roughly 22,000 light-years from Earth. The cluster is bright enough that backyard stargazers in the Southern Hemisphere can easily spot it with binoculars.NASA, ESA, and G. Piotto (Università degli Studi di Padova); Processing: Gladys Kober (NASA/Catholic University of America)
Hubble spies baby stars being born amid chaos of interacting galaxies
When two galaxies collide, the results can be destructive, with one of the galaxies ending up ripped apart, but it can also be constructive too. In the swirling masses of gas and dust pulled around by the gravitational forces of interacting galaxies, there can be bursts of star formation, creating new generations of stars. The Hubble Space Telescope recently captured one such hotbed of star formation in galaxy AM 1054-325, which has been distorted into an unusual shape due to the gravitational tugging of a nearby galaxy.
Galaxy AM 1054-325 has been distorted into an S-shape from a normal pancake-like spiral shape by the gravitational pull of a neighboring galaxy, as seen in this Hubble Space Telescope image. A consequence of this is that newborn clusters of stars form along a stretched-out tidal tail for thousands of light-years, resembling a string of pearls. NASA, ESA, STScI, Jayanne English (University of Manitoba)
Small exoplanet could be hot and steamy according to Hubble
One of the big topics in exoplanet research right now is not just finding exoplanets but also looking at their atmospheres. Tools like the James Webb Space Telescope are designed to allow researchers to look at the light coming from distant stars and see how it is filtered as it passes by exoplanets, allowing them to learn about the composition of their atmospheres. But scientists are also using older telescopes like the Hubble Space Telescope for similar research -- and Hubble recently identified water vapor in an exoplanet atmosphere.
“This would be the first time that we can directly show through an atmospheric detection that these planets with water-rich atmospheres can actually exist around other stars,” said researcher Björn Benneke of the Université de Montréal in a statement. “This is an important step toward determining the prevalence and diversity of atmospheres on rocky planets."
Hear the otherworldly sounds of interacting galaxies with this Hubble sonification
When two different galaxies get close enough together that they begin interacting, they are sometimes given a shared name. That's the case with a newly released image from the Hubble Space Telescope that shows two galaxies, NGC 274 and NGC 275, which are together known as Arp 140. not only is there a new image of the pair, but there's also a sonification available so you can hear the image as well as see it.
This new NASA Hubble Space Telescope image showcases a resplendent pair of galaxies known as Arp 140. NASA/ESA/R. Foley (University of California - Santa Cruz)/Processing: Gladys Kober (NASA/Catholic University of America)
