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Hoag's Object in the constellation Serpens. A ring galaxy in which there is a central core of older yellow stars with a ring of young blue stars. The formation of a galaxy like this probably involves a galactic collision, but it's still a mystery. If you look closely at the gap, you can see another ring galaxy in the distance.(Credit: R. Lucas (STScI/AURA), Hubble Heritage Team, NASA) Mona Evans, "Cosmic Collisions"

Twenty five years ago, in 1987, the brightest supernova in recent history was seen in the Large Magellanic Cloud. At the center is an object central to the remains of the violent stellar explosion. Surrounding the center are curious outer rings appearing as a flattened figure 8. The Hubble Telescope monitors the curious rings every few years, their origin remains a mystery. Speculation of the rings includes beamed jets emanating from an otherwise hidden neutron star left over from the…

Largest water reservoir discovered in black hole. The reservoir holds as much as 140 trillion oceans, or more than 4,000 times more than exists in the entire Milky Way. It exists as vapour spread across hundreds of light years. While water has been found across much of the universe previously, this is interesting because of the fact this reservoir is 12 billion light years away, meaning that this water existed when the universe was only 1.6 billion years old.

Using ESO's Very Large Telescope, an international team of astronomers has discovered a stunning rare case of a triple merger of galaxies. This system, which astronomers have dubbed 'The Bird' - although it also bears resemblance with a cosmic Tinker Bell - is composed of two massive spiral galaxies and a third irregular galaxy.

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The 6 Most Mind-Blowing Things Ever Discovered in Space

That insane electrical current was discovered near galaxy 3C303. It's not doing anything that cool ... it's just firing a massive jet of electrified matter 150,000 light-years into outer space. RTh 6 Most Mind-Blowing Things Ever Discovered in Space | Cracked.com

Collisions play an important role in galaxy evolution. These two galaxies—the Whirlpool and its companion—are relatively nearby at a distance of just 23 million light-years from Earth. IRAC sees the main galaxy as very red due to warm dust: a sign of active star formation that probably was triggered by the collision.

Newly discovered Galaxy SMM J2135-0102. 10 billion light years away, producing stars at rate equivalent to 250 suns per year.

A few hundred million years ago, NGC 2936 (top) was a typical spiral galaxy, until it got too close to NGC 2937 (bottom), a massive eliptical galaxy. NGC 2936 is now being distorded by the gravitational interactions, and in about 1 billion years, they will likely merge to form one galaxy. The top galaxy is also known as the Porpoise Galaxy due to its shape. They are about 300 million light years away in the constellation Hydra.

The Andromeda Galaxy (also known as M31), 2.5 million light-years away and spanning some 260,000 light-years. It took 11 different image fields from the Galaxy Evolution Explorer (GALEX) satellite's telescope to produce this portrait of the spiral galaxy in ultraviolet light.

"Dumbell Nebula - a planetary nebula in the constellation Vulpecula, at a distance of about 1,360 light years." #galaxy #nebula #universe #space #stars #science #nature

Astronomers have found a spiral galaxy that may be spinning to the beat of a different cosmic drummer. To the surprise of astronomers, the galaxy, called NGC 4622, appears to be rotating in the opposite direction to what they expected. Pictures from the NASA/ESA Hubble Space Telescope helped astronomers determine that the galaxy may be spinning clockwise by showing which side of the galaxy is closer to Earth.

NGC 3314 is a pair of overlapping spiral galaxies between 117-140 million light years away in the constellation Hydra.

Located about 130 million light-years away, NGC 4650A is one of only 100 known polar-ring galaxies. - Credit: The Hubble Heritage Team (AURA/STScI/NASA/ESA)

"The Cartwheel Galaxy" (ESO 350-40) In The Constellation Sculptor. It Was Once A Spiral Galaxy Before It Underwent A Head-On Collision With A Smaller Companion Approximately 200 Million Years Ago

Stephan's Quintet in the constellation Pegasus is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered.

Giant Arc of Light --A Mystery Observed Behind a Super-Massive Galaxy 10 Billion Light Years Away June 27, 2012 Astronomers using NASA's Hubble Space Telescope have found a puzzling arc of light behind an extremely massive cluster of galaxies residing 10 billion light-years away.

A Fox Fur, a Unicorn, and a Christmas Tree Nebula. A star forming region cataloged as NGC 2264, the complex jumble of cosmic gas and dust is about 2,700 light-years distant and mixes reddish emission nebulae excited by energetic light from newborn stars with dark interstellar dust clouds. Where the otherwise obscuring dust clouds lie close to the hot, young stars they also reflect starlight, forming blue reflection nebulae.

Many spiral galaxies have bars across their centers. Even our own Milky Way Galaxy is thought to have a modest central bar. Prominently barred spiral galaxy NGC 1073, pictured above, was captured in spectacular detail in this recently released image taken by the orbiting Hubble Space Telescope.