Hubble Legacy Field
Located southwest of Orion in the southern-hemisphere constellation Fornax, the approximately rectangular image is about 25 arcminutes to an edge. This is almost the angular diameter of a full moon viewed from Earth (which is about 31 arcminutes, or a half a degree).
The images and data release were announced on May 2, 2019, by NASA.
Planning
As with the earlier fields, this one was required to contain very little emission from our galaxy, with little Zodiacal dust. The field was also required to be in a range of declinations such that it could be observed both by southern hemisphere instruments, such as the Atacama Large Millimeter Array, and northern hemisphere ones, such as those located on Hawaii. It was ultimately decided to observe a section of the Chandra Deep Field South, due to existing deep X-ray observations from Chandra X-ray Observatory and two interesting objects already observed in the Great Observatories Origins Deep Survey sample at the same location: a redshift 5.8 galaxy and a supernova. The coordinates of the field are right ascension 3 33 , declination −27° 47′ (J2000).
Observations
The Hubble Legacy Field is composed of data from 7,500 exposures, with a total exposure time of 250 days.
Video
See also
References
- ^ "HubbleSite: News - Hubble Astronomers Assemble Wide View of the Evolving Universe". hubblesite.org.
- ^ Ashley Strickland. "This image is a 'history book' of the universe". CNN.
- ^ "HubbleSite: Categories - news". hubblesite.org.
- ^ "Moon Illusion". homepages.wmich.edu. Archived from the original on 2017-05-09. Retrieved 2019-05-05.
- ^ Plait, Phil (May 3, 2019). "The Legacy of Hubble: One image, a quarter MILLION galaxies". SYFY Wire.
External links