Artist's impression of the hot planet Osiris: This is an artistic illustration of the gas giant planet HD 209458b (unofficially named Osiris) located 150 light-years away in the constellation Pegasus. This is a "hot Jupiter" class planet. Estimated to be 220 times the mass of Earth. The planet's atmosphere is almost 1000 degrees celsius. It orbits very closely to its bright sun-like star, and the orbit is tilted edge-on to Earth. This makes the planet an ideal candidate for the NASA/ESA Hubble Space Telescope to analyse and make precise measurements of the chemical composition of the giant's atmosphere as starlight filters though it. To the surprise of astronomers, they have found much less water vapor in the atmosphere than standard planet-formation models predict.

Name: HD 209458b, Osiris
Type: Milky Way : Planet : Type : Gas Giant
Category: Solar System
Release date: 24 July 2014, 17:20
Credit: NASA, ESA, and G. Bacon (STScI)

Atmospheric spectra of three hot Jupiters showing water absorption: This graph compares observations with modeled infrared spectra for three hot-Jupiter-class exoplanets. These exoplanets were spectroscopically observed with the NASA/ESA Hubble Space Telescope. The red curve in each case is the best-fit model spectrum for the detection of water vapor absorption in the planetary atmosphere. The blue circles and error bars show the processed and analysed data from Hubble's spectroscopic observations.

Name: HD 189733b, HD 209458b, Osiris, WASP-12b
Type: Milky Way : Planet : Type : Gas Giant
Category: Solar System
Release date: 24 July 2014, 17:20
Credit: NASA, ESA, N. Madhusudhan (University of Cambridge), and A. Feild and G. Bacon (STScI)

Artist's impression of supernova 1993J: This is an artist's impression of supernova 1993J, an exploding star in the galaxy M81 whose light reached us 21 years ago. The supernova originated in a double-star system where one member was a massive star that exploded after siphoning most of its hydrogen envelope to its companion star. After two decades, astronomers have at last identified the blue helium-burning companion star, seen at the center of the expanding nebula of debris from the supernova. The NASA/ESA Hubble Space Telescope identified the ultraviolet glow of the surviving companion embedded in the fading glow of the supernova.

Name: SN 1993J
Type: Local Universe : Star : Evolutionary Stage : Supernova
Category: Stars
Distance: 11 million light years
Release date: 10 September 2014, 11:55
Credit: NASA, ESA, and G. Bacon (STScI)

Spiral galaxy M81: This NASA/ESA Hubble Space Telescope photo shows the majestic spiral galaxy M81. In the midsts of this galaxy is the supernova 1993J which was recently found to have a companion star which had been hidden in the glow of the supernova for 21 years. The location of the supernova can be seen in the annotated version of this image.

Name: M81
Type: Local Universe : Galaxy : Type : Spiral
Category: Galaxies
Constellation: Ursa Major
Distance: 11 million light years
Release date: 10 September 2014, 11:55
Credit: NASA, ESA, A. Zezas (CfA), and A. Filippenko (UC Berkeley) Acknowledgment: Hubble Heritage Team (STScI/AURA) & O. Fox (University of California, Berkeley)

Scenario for Type IIb supernova 1993J: This illustration shows the key steps in the evolution of a Type IIb supernova. Panel 1: Two very hot stars orbit about each other in a binary system. Panel 2: The slightly more massive member of the pair evolves into a bloated red  giant and spills the hydrogen in its outer envelope onto the companion star. Panel 3: The more massive star explodes as a supernova. Panel 4: The companion star survives the explosion. Because it has locked up  most of the hydrogen in the system, it is a larger and hotter star than when it was  born. The fireball of the supernova fades.

Name: SN 1993J
Type: Local Universe : Star : Evolutionary Stage : Supernova
Category: IllustrationsStars
Release date: 10 September 2014, 11:55
Credit: NASA, ESA, and A. Feild (STScI)

Hubble sees ghost light from dead galaxies in galaxy cluster Abell 2744: The massive galaxy cluster Abell 2744, nicknamed Pandora's Cluster, takes on a ghostly look in this NASA/ESA Hubble Space Telescope view. In this image the total starlight from the cluster has been artificially coloured blue. This reveals that not all the starlight is contained within the cities of stars — the galaxies — which appear as bright blue-white blobs. A fraction of the starlight is also dispersed throughout the  cluster, as seen in the darker blue regions. This light comes from dead galaxies. The galaxies were torn apart long ago by the cluster's gravitational forces, and their stars were scattered into what is known as intracluster space — the space between the galaxies. These orphaned stars roam the cluster, without being gravitationally tethered to any single galaxy. Because these extremely faint stars are brightest at near-infrared wavelengths of light, this type of observation could only be accomplished with Hubble’s infrared sensitivity to extraordinarily dim light. The galaxies that are not coloured blue are either in the foreground or background and are not part of the cluster.

Name: Abell 2744
Type: Early Universe : Galaxy : Type : Gravitationally LensedEarly Universe : Galaxy : Grouping : ClusterEarly Universe : Cosmology : Phenomenon : Lensing
Category: CosmologyGalaxies
Constellation: Sculptor
Distance: 4 billion light years
Release date: 31 October 2014, 15:42
Credit: NASA, ESA, M. Montes (IAC), and J. Lotz, M. Mountain, A. Koekemoer, and the HFF Team (STScI)

Illustration showing Mars and Comet Siding Spring encounter: This illustration — created for a NASA press release — combines data from the NASA/ESA Hubble Space Telescope of Comet Siding Spring and separate Hubble data of Mars. On 19 October 2014 — the day that the images of both Mars and the comet were taken — at 20:28 CEST, the comet passed within only 140 000 kilometres of the red planet — roughly a third the distance between the Earth and the Moon. At that time the comet and Mars were almost 250 million kilometres from Earth. This flyby of Comet Siding Spring is the closest encounter of a comet with a planet ever observed! The background starfield, which has been added to this image, is synthesised from ground-based telescope data

Name: Comet C/2013 A1, Mars
Type: Solar System : PlanetSolar System : Interplanetary Body : Comet
Category: Solar System
Release date: 27 October 2014, 15:12
Credit: NASA, J.-Y. Li (Planetary Science Institute), C.M. Lisse (JHU/APL), and the Hubble Heritage Team (STScI/AURA)

Artist’s impression of a Kuiper Belt object: This is an artist's impression of a Kuiper Belt object (KBO), located on the outer  rim of our Solar System at a staggering distance of 6.5 billion kilometres from the Sun. Unlike asteroids, KBOs have not been heated by the Sun, and so are thought to  represent a pristine, well preserved, deep-freeze sample of what the outer Solar  System was like following its birth 4.6 billion years ago. The Sun appears as a bright star at image centre of this graphic, which represents the view from the KBO. The Earth and other inner planets are too close to the Sun to be seen in the illustration. The bright dot to the left of the Sun is the planet Jupiter, and the bright object below the Sun is the planet Saturn. Two bright pinpoints of light to the right of the Sun, midway to the edge of the frame, are the planets Uranus and Neptune, respectively. The planet positions are plotted for late 2018. The Milky Way appears in the background. A Hubble survey has uncovered three KBOs, ranging from 43 to 56 kilometres across, that are potentially reachable by NASA's New Horizons spacecraft after it passes by Pluto in mid-2015.

Name: Kuiper Belt Object
Type: Solar System : Interplanetary Body
Category: Illustrations
Release date: 16 October 2014, 09:37
Credit: NASA, ESA, and G. Bacon (STScI)