Brightest Cluster Galaxies: This sample of galaxies, as seen by Hubble, shows chains of star formation in ultraviolet light. This star formation is a product of the action of the jets from a central black hole that controls infalling gas from the galaxy's halo.

Type: Early Universe : Galaxy : Component : Central Black Hole
Category: Galaxies
Release date: 7 August 2015, 18:25
Credit: NASA, ESA, G. Tremblay (Yale University), and R. Mittal (Rochester Institute of Technology, and Max Planck Institute for Gravitational Physics)

Star Formation Triggered by Black-Hole Jets: This artist's rendering shows a central black hole interacting with gas in the galaxy's halo to create a self-regulating cycle. In this cycle, jets shooting out of the galaxy's center heat a halo of surrounding gas, controlling the rate at which the gas cools and falls into the galaxy to form stars.

Type: Early Universe : Galaxy : Component : Central Black Hole
Category: Galaxies
Release date: 7 August 2015, 18:25
Credit: NASA, ESA, and P. Jeffries (STScI)

Identifying Planets: This graphic illustrates how a star can magnify and brighten the light of a background star when it passes in front of the distant star. If the foreground star has planets, then the planets may also magnify the light of the background star, but for a much shorter period of time than their host star. Astronomers use this method, called gravitational microlensing,  to identify planets.

Name: OGLE-2005-BLG-169Lb
Type: Unspecified : Planet
Category: Exoplanets
Distance: 9000 light years
Release date: 3 August 2015, 09:20
Credit: NASA, ESA, and A. Feild (STScI)

Scenario for Homeless Supernovae: This illustration offers a plausible scenario for how vagabond stars exploded as supernovae outside the cozy confines of galaxies.

Type: Early Universe : Star : Evolutionary Stage : Supernova
Category: Cosmology
Release date: 13 August 2015, 18:00
Credit: NASA, ESA, and P. Jeffries and A. Feild (STScI)

Artist's concept of double black hole: This artistic illustration is of a binary black hole found in the center of the nearest quasar to Earth, Markarian 231. Like a pair of whirling skaters, the black-hole duo generates tremendous amounts of energy that makes the core of the host galaxy outshine the glow of its population of billions of stars. Quasars have the most luminous cores of active galaxies and are often fueled by galaxy collisions. Hubble observations of the ultraviolet light emitted from the nucleus of the galaxy were used to deduce the geometry of the disk, and astronomers were surprised to see light diminishing close to the central black hole. They deduced that a smaller companion black hole has cleared out a donut hole in the accretion disk, and the smaller black hole has its own mini-disk with an ultraviolet glow.

Name: Markarian 231
Type: Early Universe : Galaxy : Component : Central Black Hole
Category: Quasars and Black Holes
Distance: 550 million light years
Release date: 28 August 2015, 11:08
Credit: NASA, ESA, and G. Bacon (STScI)

Markarian 231, host galaxy of double black hole: This Hubble Space Telescope image reveals a bright starlike glow in the center of the interacting galaxy Markarian 231, the nearest quasar to Earth. Located 600 million light-years away, we are seeing the galaxy as it looked before multicelled life first appeared on Earth. Quasars are powered by a central black hole that heats the gas around it to unleash tremendous amounts of energy. Hubble spectroscopic observations infer the presence of two supermassive black holes whirling around each other. Because such a dynamic-duo pair are found in the nearest quasar, it would imply that many quasars host binary-black-hole systems. It would be a natural result of a galaxy merger.

Name: Markarian 231
Type: Early Universe : Galaxy : Component : Central Black Hole
Category: Quasars and Black Holes
Constellation: Ursa Major
Distance: 550 million light years
Release date: 28 August 2015, 11:08
Credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration, and A. Evans (University of Virginia, Charlottesville/NRAO/Stony Brook University)

Signatures of the Earliest Galaxies: The three panels show different components of near-infrared background light detected by the Hubble Space Telescope in deep-sky surveys. The one on the left is a mosaic of images taken over a 10-year period. When all the stars and galaxies are masked, the background signals can be isolated, as seen in the second and third panels. The middle panel reveals "intra-halo light" from rogue stars torn from their host galaxies, and the panel on the right captures the signature of the first galaxies formed in the universe. NASA Press release

Name: SpARCS1049+56
Type: Early Universe : GalaxyEarly Universe : Cosmology
Category: CosmologyGalaxies
Release date: 15 September 2015, 08:37
Credit: NASA, ESA, and K. Mitchell-Wynne (University of California, Irvine)

Artist's Concept of Earth-Like Planets in the Future Universe: This is an artist's impression of innumerable Earth-like planets that have yet to be born over the next trillion years in the evolving universe. NASA Press release

Type: Milky Way : Planet
Category: Exoplanets
Release date: 21 October 2015, 11:00
Credit: NASA, ESA, and G. Bacon (STScI)

Hubble Spots White Dwarfs in Milky Way's Central Hub: The NASA/ESA Hubble Space Telescope has detected for the first time a  population of white dwarfs embedded in the hub of our Milky Way galaxy. The Hubble images are the deepest, most detailed study of the galaxy's central bulge of stars. The smoldering remnants of once-vibrant stars can yield clues to our galaxy's early construction stages that happened long before Earth and our sun formed. [Left] - This is a view of the Milky Way's central bulge, seen in the  direction of the constellation Sagittarius. Giant dust clouds along this line block most of the starlight coming from the galactic center. Hubble, however, peered through a region (marked by the arrow) called the Sagittarius Window, which offers a keyhole view into the galaxy's hub. [Upper right] - This is a small section of Hubble's view of the dense  collection of stars crammed together in the galactic bulge. The region  surveyed is part of the Sagittarius Window Eclipsing Extrasolar Planet  Search (SWEEPS) field and is located 26,000 light-years away. [Lower right] - Hubble uncovered extremely faint and hot white dwarfs.  This is a sample of 4 out of the 70 brightest white dwarfs spied by  Hubble in the Milky Way's bulge. Astronomers picked them out based on  their faintness, blue-white color, and motion relative to our sun. The  numbers in the inset images correspond to the white dwarfs' location in the larger Hubble view.  Hubble's Advanced Camera for Surveys made the observations in 2004  and 2011-2013. NASA Press release

Name: Milky Way Center, SWEEPS
Type: Milky Way : Star : Evolutionary Stage : White DwarfMilky Way : Galaxy : Component : Center/Core
Category: GalaxiesStars
Release date: 6 November 2015, 12:25
Credit: Credit for Hubble Images: NASA, ESA, A. Calamida and K. Sahu (STScI), and the SWEEPS Science Team Credit for Ground-based Image: A. Fujii