The Wirlpool glitters in x-ray light. Click for larger. Credit: X-ray: NASA/CXC/Wesleyan Univ./R.Kilgard, et al; Optical: NASA/STScI
The Whirlpool Galaxy or M51 is a nice telescope target in the northern sky. I think it could be seen with binoculars with good skies because even at around 37 million light-years (11.3 Mpc) the galaxy pair is a bright 8.4.
This is also a very large system, the image spans 52,000 by 87,000 light-years.
The Chandra image is the product of a combined exposure of 9 days, 16 hours and 10 minutes between the x-ray and optical components. It really does sparkle in x-ray light.
Nearly a million seconds of observing time with NASA’s Chandra X-ray Observatory has revealed a spiral galaxy similar to the Milky Way glittering with hundreds of X-ray points of light.
The galaxy is officially named Messier 51 (M51) or NGC 5194, but often goes by its nickname of the “Whirlpool Galaxy.” Like the Milky Way, the Whirlpool is a spiral galaxy with spectacular arms of stars and dust. M51 is located about 30 million light years from Earth, and its face-on orientation to Earth gives us a perspective that we can never get of our own spiral galactic home.
Read the rest and get larger version at the Chandra website.
Hubble records the shrinking of Jupiter’s Great Red Spot. Credit: NASA, ESA, and A. Simon (Goddard Space Flight Center) Acknowledgment: C. Go, H. Hammel (Space Science Institute, Boulder, and AURA), and R. Beebe (New Mexico State University)
The famous Red Spot on Jupiter is shrinking and thanks to this great look from Hubble we can see exactly how much.
Just look at Jupiter though, stunning!
Jupiter’s monster storm, the Great Red Spot, was once so large that three Earths would fit inside it. But new measurements by NASA’s Hubble Space Telescope reveal that the largest storm in our solar system has downsized significantly. The red spot, which has been raging for at least a hundred years, is only the width of one Earth. What is happening? One possibility is that some unknown activity in the planet’s atmosphere may be draining energy and weakening the storm, causing it to shrink. The Hubble images were taken in 1995, 2009, and 2014.
A very nice look at NGC 4605 by Hubble. Credit: ESA/Hubble & NASA, Acknowledgement: D. Calzetti (University of Massachusetts) and the LEGUS Team
Some overlooked viewing opportunities are available in the northern skies. Not surprising, all the action is near the ecliptic and the northern sky is by comparison sparsely populated in the north.
If you are looking for something different, try a good look in and around Ursa Major.
Below is the description from a NASA site, the link will go to that page with larger versions of the image. The description talks about groups or clusters of galaxies and how even they are bound to each other by gravity — good stuff.
Hubble Eyes a Scale of the Universe
This bundle of bright stars and dark dust is a dwarf spiral galaxy known as NGC 4605, located around 16 million light-years away in the constellation of Ursa Major (The Great Bear). This galaxy’s spiral structure is not obvious from this image, but NGC 4605 is classified as an SBc type galaxy — meaning that it has sprawling, loosely wound arms and a bright bar of stars cutting through its center.
Hubble’s look at the aurora on Saturn. Credit: NASA/ESA, Acknowledgement: J. Nichols (University of Leicester)
The details from ESA’s Space in Images:
Astronomers using the NASA/ESA Hubble Space Telescope have captured new images of the dancing auroral lights at Saturn’s north pole. Taken in April and May 2013 from Hubble’s perspective in orbit around Earth, these observations provide a detailed look at previously unseen dynamics in the choreography of the auroral glow.
The ultraviolet images, taken by Hubble’s super-sensitive Advanced Camera for Surveys, capture moments when Saturn’s magnetic field is affected by bursts of particles streaming from the Sun.
Saturn’s magnetosphere – the vast magnetic ‘bubble’ that surrounds the planet – is compressed on the Sunward side of the planet, and streams out into a long ‘magnetotail’ on the nightside.
It appears that when particles from the Sun hit Saturn, the magnetotail collapses and later reconfigures itself, an event that is reflected in the dynamics of its auroras.
Saturn was caught during a very dynamic light show – some of the bursts of light seen shooting around Saturn’s polar regions travelled more than three times faster than the speed of the gas giant’s roughly 10-hour rotation period!
The new observations were taken as part of a three-year Hubble observing campaign, and are presented in a paper published in the journal Geophysical Research Letters. The images complement those taken by the international Cassini spacecraft orbiting Saturn.
The galaxy known as M61 as seen by Hubble. Credit: ESA/Hubble & NAS, Acknowledgement: Det58
This image of the galaxy M61 by Hubble. This galaxy is a very nice telescope target and if you have dark skies possibly even binoculars can pick it out. Currently M61 is leading Mars so if you can see Mars you can see this galaxy.
M61 from SEDS.
The description from NASA and ESA:
This new Hubble picture is the sharpest ever image of the core of spiral galaxy Messier 61. Taken using the High Resolution Channel of Hubble’s Advanced Camera for Surveys, the central part of the galaxy is shown in striking detail.
Also known as NGC 4303, this galaxy is roughly 100,000 light-years across, comparable in size to our galaxy, the Milky Way. Both Messier 61 and our home galaxy belong to a group of galaxies known as the Virgo Supercluster in the constellation of Virgo (The Virgin) — a group of galaxy clusters containing up to 2,000 spiral and elliptical galaxies in total.
Messier 61 is a type of galaxy known as a starburst galaxy. Starburst galaxies experience an incredibly high rate of star formation, hungrily using up their reservoir of gas in a very short period of time (in astronomical terms). But this is not the only activity going on within the galaxy; deep at its heart there is thought to be a supermassive black hole that is violently spewing out radiation.
Despite its inclusion in the Messier Catalogue, Messier 61 was actually discovered by Italian astronomer Barnabus Oriani in 1779. Charles Messier also noticed this galaxy on the very same day as Oriani, but mistook it for a passing comet — the comet of 1779.
A gravitaional lensed galaxy from Hubble and Hershel. Credit: NASA/STScI; S. Allam and team; and the Master Lens Database, L. A. Moustakas, K. Stewart, et al (2014)
Hubble and Herschel combine to study the galaxy known as S0901 seen here as a arc. The arc is a result of huge gravitational forces from a galaxy or galaxies between us and the galactic arc, gravity so strong light from the more distant S0901 is actually magnified and bent into an arc.
Fascinating stuff! I do wonder if we will ever be able to sort of reverse engineer the arc into some semblance of the actual hidden galaxy.
target=”blank’>More images and the following caption at NASA:
The young galaxy SDSS090122.37+181432.3, also known as S0901, is seen here as the bright arc to the left of the central bright galaxy. The distorted view of S0901 is caused by gravitational lensing, resulting from one or more galaxies that lie between the observer and S0901. Although one effect of lensing is to distort the image, another effect is to magnify the light of the lensed object. This effect was used to enable scientists to study S0901 with Herschel’s Heterodyne Instrument for the Far-Infrared (HIFI).
Hubble used the Advance Camera for Surveys to get this look at NGC 3455. Credit: ESA/Hubble & NASA, Acknowledgement: Nick Rose
Located at RA: 10 51 52/DEC: 17 33.1 in the constellation Leo. The photo caption at NASA and included below pegs the distance at 65 million light-years what it doesn’t say is the red-shift velocity is about 1102 km sec / 685 miles per second!
The companion galaxy mentioned in the press release NGC 3454 can be seen here. NGC 3455 is the galaxy at the center and above that you can see the bright star (from the Hubble image) in the center and the cigar shaped NGC 3454 above that. Image: Simbad
A very nice image and you can get more sizes at the link below.
The NASA/Hubble press release:
Shown here is a spiral galaxy known as NGC 3455, which lies some 65 million light-years away from us in the constellation of Leo (the Lion).
Galaxies are classified into different types according to their structure and appearance. This classification system is known as the Hubble Sequence, named after its creator Edwin Hubble.
In this image released 14, April, 2014, NGC 3455 is known as a type SB galaxy — a barred spiral. Barred spiral galaxies account for approximately two thirds of all spirals. Galaxies of this type appear to have a bar of stars slicing through the bulge of stars at their center. The SB classification is further sub-divided by the appearance of a galaxy’s pinwheeling spiral arms; SBa types have more tightly wound arms, whereas SBc types have looser ones. SBb types, such as NGC 3455, lie in between.
The Tadpole and the Wriggler. Click for larger. Copyright NASA, ESA, the Hubble Heritage Team (STScI/AURA), and IPHAS
I want to see the Goldfish. Ok I spent five minutes looking for it until I re-read the press release and the bit about it being just out of view. Larger and full-res versions availble at the link below.
BTW, I LOVE the title from ESA for selfish reasons. LOL.
From ESA Spaceinimages (The Tadpole and the Wriggler):
A bright blue tadpole appears to swim through the inky blackness of space. Known as IRAS 20324+4057 but dubbed “the Tadpole”, this clump of gas and dust has given birth to a bright protostar, one of the earliest steps in building a star.
There are actually multiple protostars within this tadpole’s ‘head’, but the glowing yellow one in this image is the most luminous and massive. When this protostar has gathered together enough mass from its surroundings, it will eventually emerge as a fully-fledged young star.