#universe
This Hubble image captures a portion of a dark nebula in the constellation Cepheus. Dark nebulae ― also called absorption nebulae ― are clouds of gas and dust that neither emit nor reflect light, instead blocking light coming from behind them. These nebulae tend to contain large amounts of dust, which allows them to absorb visible light from stars or nebulae beyond them.
Credit: NASA, ESA, T. Megeath (University of Toledo), and K. Stapelfeldt (Jet Propulsion Laboratory); Processing: Gladys Kober (NASA/Catholic University of America)
Messier 89 galaxy by Hubble space telescope
Credit: NASA/ESA, Hubble
This image shows knots of cold, dense interstellar gas where new stars are forming. These Free-floating Evaporating Gaseous Globules (frEGGs) were first seen in Hubble’s famous 1995 image of the Eagle Nebula. Because these lumps of gas are dark, they are rarely seen by telescopes. They can be observed when the newly forming stars ignite, their intense ultraviolet radiation eroding the surrounding gas away and letting the denser, more resistant frEGGs remain. These frEGGs are located in the Northern Coalsack Nebula in the direction of Cygnus.
Credit: NASA, ESA, and R. Sahai (Jet Propulsion Laboratory); Processing: Gladys Kober (NASA/Catholic University of America)
These are galaxies of the Hercules Cluster, an archipelago of island universes a mere 500 million light-years away. Also known as Abell 2151, this cluster is loaded with gas and dust rich, star-forming spiral galaxies but has relatively few elliptical galaxies, which lack gas and dust and the associated newborn stars.
Image Credit: Ken Crawford
FullPink Moon over Ely Cathedralin the morning
lVeronicaJoPo l Ely, Cambridgeshire, England
AprilFull Moon l Rami Ammoun
Butterfly Nebula lEricsElectrons
Moments of the Sun l Seán Doran
“Across the sea of space, the stars are other suns.”—Carl Sagan
l Nebulae & Stars taken by Nick Perkins
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