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The Dark Energy Survey (DES) is an astronomical survey designed to constrain the properties of dark energy.It uses images taken in the near-ultraviolet, visible, and near-infrared to measure the expansion of the universe using Type Ia supernovae, baryon acoustic oscillations, the number of galaxy clusters, and weak gravitational lensing. [1]
Hubble eXtreme Deep Field: 2012: 2.3′x3′ Hubble Ultra-Deep Field (UV/VIS/NIR) 2014: Hubble Frontier Fields MACS J0416.1-2403 [10] 2015: Hubble Frontier Fields Abell 2744 [11] 2015: Hubble Frontier Fields MACS J0717.5+3745: 2015: Hubble Frontier Fields MACS J1149.5+2223 [12] 2015: Hubble Frontier Fields Abell S1063 [13] 2016: Hubble Frontier ...
The largest galaxies are called elliptical because they look like big globes of light emitted from a multitude of stars. The most famous elliptical galaxy is M87, which has up to 2.4 trillion stars.
[8] [9] Spectroscopic observations of GLASS-z12 by the Atacama Large Millimeter Array (ALMA) in August 2022 confirmed that the galaxy has a spectroscopic redshift of 12.117 ± 0.012, making it one of the earliest and most distant galaxies ever discovered, dating back to just 350 million years after the Big Bang, 13.6 billion years ago.
In one picture, Euclid captured a group shot of 1,000 galaxies in a cluster 240 million light-years away, against a backdrop of more than 100,000 galaxies billions of light-years away. A light ...
The Davis–Greenstein effect causes elongated dust grains to align themselves with a galaxy's magnetic field, resulting in weak optical polarization. This has been used to show ordered magnetic fields that exist in several nearby galaxies. Magneto-hydrodynamic processes in active elliptical galaxies produce their characteristic jets and radio ...
One feature that has been found is that voids have been shown to contain a significantly higher fraction of starburst galaxies of young, hot stars when compared to samples of galaxies in walls. [42] Voids offer opportunities to study the strength of intergalactic magnetic fields.
A field galaxy is a galaxy that does not belong to a larger galaxy group or cluster and hence is gravitationally alone. Roughly 80% of all galaxies located within 5 Mpc (16 Mly) of the Milky Way are in groups or clusters of galaxies. [1] Most low-surface-brightness galaxies are field galaxies. [2]