Hubble’s Most Used Digital camera Celebrates 20 Years of Unbelievable Discoveries


Hubble ACS Camera

The Hubble House Telescope lately celebrated its twentieth yr utilizing the Superior Digital camera for Surveys (ACS), which was put in on Hubble in March of 2002 and have become its most used digital camera.

The ACS wavelength vary extends from the ultraviolet, via the seen spectrum, and out to the near-infrared. The ACS is ready to map massive areas of the sky in nice element, and following its set up, the ACS grew to become Hubble’s most closely used instrument.

Hubble ACS
The sunshine echo across the star V838 Monocerotis as seen by the Hubble House Telescope in November 2005.

125,000 Images and Counting

In its 20 years aboard Hubble, the ACS has captured 125,000 photos. These observations have been the supply of quite a few discoveries, a number of of that are outlined on the European House Company (ESA) web site.

Hubble ACS
Astronauts Andrew Feustel (left) and John Grunsfeld, each STS-125 mission specialists, take part within the mission’s third session of extravehicular exercise (EVA) as work continues to refurbish and improve the Hubble House Telescope. Throughout the six-hour, 36-minute spacewalk, Grunsfeld and Feustel eliminated the Corrective Optics House Telescope Axial Alternative and put in instead the brand new Cosmic Origins Spectrograph. Additionally they accomplished the Superior Digital camera for Surveys digital card alternative work, and accomplished half 2 of the ACS restore, putting in a brand new electronics field and cable.

“We knew the ACS would add a lot discovery potential to the telescope, however I don’t assume anyone actually understood the whole lot it may do,” Former astronaut — and one of many two who put in the ACS on Hubble — Mike Massimino says. “It was going to unlock the secrets and techniques of the Universe.”

The ACS Digital camera

The ESA explains that the ACS is made up of three subinstruments: the Huge Subject Channel, the Excessive Decision Channel, and the Photo voltaic Blind Channel. The Huge Subject Channel is a high-efficiency, wide-field, optical, and near-infrared digital camera that’s designed to search for galaxies and galaxy clusters, the ESA explains.

Hubble ACS
The Superior Digital camera for Surveys (ACS) aboard the NASA/ESA Hubble House Telescope has used a pure ‘zoom lens’ in area to spice up its view of the distant universe. In addition to providing an unprecedented and dramatic new view of the cosmos, the outcomes promise to make clear galaxy evolution and darkish matter in area. Hubble peered straight via the middle of one of the vital huge galaxy clusters recognized, referred to as Abell 1689. For this statement, Hubble needed to gaze on the distant cluster, situated 2.2 billion light-years away, for greater than 13 hours. The gravity of the cluster’s trillion stars ” plus darkish matter ” acts as a 2-million-light-year-wide ‘lens’ in area. This ‘gravitational lens’ bends and magnifies the sunshine of galaxies situated far behind it, distorting their shapes and creating a number of photos of particular person galaxies.

The Excessive Decision Channel was designed to take detailed pictures of the sunshine from galaxies that featured huge black holes. This specific mode shouldn’t be presently operational. Lastly, the Photo voltaic Blind Channel blocks seen gentle to permit faint ultraviolet radition to be seen. This channel can be utilized to review climate patterns on different planets; for instance, aurorae on Jupiter.

Hubble ACS
A colliding galaxy dubbed the “Tadpole” (catalog identify UGC10214) is about towards a wealthy tapestry of 6,000 galaxies. The Tadpole, with its lengthy tail of stars, seems to be like a runaway pinwheel firework, not like the textbook photos of stately spiral galaxies. Its distorted form was brought on by a small interloper, a really blue, compact galaxy seen close to the extra huge Tadpole. The Tadpole resides about 420 million light-years away within the constellation Draco. Seen shining via the Tadpole’s disk, the tiny intruder is probably going a hit-and-run galaxy that’s now leaving the scene of the accident. Sturdy gravitational forces from the interplay created the lengthy tail of particles, consisting of stars and fuel that stretch out greater than 280,000 light-years.

The ESA says that amongst its many accomplishments, the ACS helps map the distribution of darkish matter, detects essentially the most distant objects within the Universe, searches for large exoplanets, and research the evolution of clusters of galaxies.

“20 years into its mission, the ACS continues to ship ground-breaking science and among the most unimaginable photos of the distant Universe, and the whole lot in between,” Dan Coe, an ESA/AURA astronomer who was a part of the ACS group as an instrument scientist, says. “Wanting again via the archive of ACS photos reminds us of the huge variety of galaxies, colours, and tales which were shared with the world.”


Header picture caption: This assortment of photos options these taken by the NASA/ESA Hubble House Telescope’s Superior Digital camera for Surveys (ACS), which is marking 20 years of operation in March of 2022.  


Picture credit: NASA, ESA

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