Menu
Scientific revolution
Water Flowing On Mars, NASA Spacecraft Data Suggest

Light Shed On South Pole Dinosaurs

Why Plant 'Clones' Aren't Identical

Puffins 'Scout Out' Best Migration Route

New Conducting Properties Discovered in Bacteria-Produced Wires

Researchers Unravel the Magic of Flocks of Starlings

'Paranoia' About Rivals Alters Insect Mating Behavior

Billion-Year-Old Piece of North America Traced Back to Antarctica

You Can Count On This: Math Ability Is Inborn, New Research Suggests

Scientist Develops Virus That Targets HIV: Using a Virus to Kill a Virus

DNA Building Blocks Can Be Made in Space, NASA Evidence Suggests

Polar Dinosaur Tracks Open New Trail to Past

New Eruption Discovered at Undersea Volcano, After Successfully Forecasting the Event

Study Builds On Plausible Scenario for Origin of Life On Earth

Scientists Have New Help Finding Their Way Around Brain's Nooks and Crannies

Astronomy: A Spectacular Spiral in Leo

Hydrogen-Powered Symbiotic Bacteria Found in Deep-Sea Hydrothermal Vent Mussels

Deep Recycling in Earth Faster Than Thought

Engineers Reverse E. Coli Metabolism for Quick Production of Fuels, Chemicals

Genetically Modified 'Serial Killer' T-Cells Obliterate Tumors in Leukemia Patients

Biodiversity Key to Earth's Life-Support Functions in a Changing World

Darkest Known Exoplanet: Alien World Is Blacker Than Coal

Arctic Ice Melt Could Pause for Several Years, Then Resume Again

Like Humans, Chimps Are Born With Immature Forebrains

Decade-Long Study Reveals Recurring Patterns of Viruses in the Open Ocean

Astronomy: A Spectacular Spiral in Leo
This new picture from ESO's Very Large Telescope shows NGC 3521, a spiral galaxy located about 35 million light years away in the constellation of Leo (The Lion). Spanning about 50,000 light-years, this spectacular object has a bright and compact nucleus, surrounded by richly detailed spiral structure.

The most distinctive features of the bright galaxy NGC 3521 are its long spiral arms that are dotted with star-forming regions and interspersed with veins of dust. The arms are rather irregular and patchy, making NGC 3521 a typical example of a flocculent spiral galaxy. These galaxies have "fluffy" spiral arms that contrast with the sweeping arms of grand-design spirals such as the famous Whirlpool galaxy or M 51, discovered by Charles Messier.

NGC 3521 is bright and relatively close-by, and can easily be seen with a small telescope such as the one used by Messier to catalogue a series of hazy and comet-like objects in the 1700s. Strangely, the French astronomer seems to have missed this flocculent spiral even though he identified several other galaxies of similar brightness in the constellation of Leo.

It was only in the year that Messier published the final version of his catalogue, 1784, that another famous astronomer, William Herschel, discovered NGC 3521 early on in his more detailed surveys of the northern skies. Through his larger, 47-cm aperture, telescope, Herschel saw a "bright center surrounded by nebulosity," according to his observation notes.

In this new VLT picture, colourful, yet ill defined, spiral arms replace Herschel's "nebulosity." Older stars dominate the reddish area in the centre while young, hot blue stars permeate the arms further away from the core.

Oleg Maliy, who participated ESO's Hidden Treasures 2010 competition, selected the data from the FORS1 instrument on ESO's VLT at the Paranal Observatory in Chile that were used to create this dramatic image. Exposures taken through three different filters that passed blue light (coloured blue), yellow/green light (coloured green), and near-infrared light (coloured red) have been combined to make this picture. The total exposure times were 300 seconds per filter. Oleg's image of NGC 3521 was a highly ranked entry in the competition, which attracted almost 100 entries.

Для печати

Polar Ice Caps Can Recover from Warmer Climate-Induced Melting, Study Shows

Sniffer Dogs Can Be Used to Detect Lung Cancer, Research Suggests

Further, Faster, Higher: Wildlife Responds Increasingly Rapidly to Climate Change

Simple Way to Grow Muscle Tissue With Real Muscle Structure

Parasite Uses the Power of Attraction to Trick Rats Into Becoming Cat Food

Growth of Cities Endangers Global Environment, According to New Analysis

Common Cause of All Forms of Amyotrophic Lateral Sclerosis (ALS) Discovered

Oldest Fossils On Earth Discovered

Plants and Fungi Play the 'Underground Market'

Galaxies Are Running out of Gas: Why the Lights Are Going out in the Universe

Antennas in Your Clothes? New Design Could Pave the Way

Astronomers Find Ice and Possibly Methane On Snow White, a Distant Dwarf Planet

Yeast's Epic Journey 500 Years Ago Gave Rise to Lager Beer


Menu
Smart Skin: Electronics That Stick and Stretch Like a Temporary Tattoo

Supernovae Parents Found: Clear Signatures of Gas Outflows from Stellar Ancestors

Hidden Soil Fungus, Now Revealed, Is in a Class All Its Own

Effortless Sailing With Fluid Flow Cloak

Research Reveals Genetic Link to Human Intelligence

Hidden Baja Undersea Park Is the World's Most Robust Marine Reserve

Searching for Spin Liquids: Much-Sought Exotic Quantum State of Matter Can Exist

How Butterflies Copy Their Neighbors to Fool Birds

Increased Tropical Forest Growth Could Release Carbon from the Soil

Fruit Bats Navigate With Internal Maps: Scientists Fit Bats With World's Smallest GPS Devices

Rapid Evolution Within Single Crop-Growing Season Increases Insect Pest Numbers

E. Coli, Salmonella May Lurk in Unwashable Places in Produce

Biologists Confirm Sunflower Domesticated in Eastern North America

Oldest Evidence of Nails in Modern Primates

Breathing New Life Into Earth: Evidence of Early Oxygen in the Oceans of Our Planet

Key Mechanism That Regulates Shape and Growth of Plants Discovered

Speaking and Understanding Speech Share the Same Parts of the Brain

Quantum Optical Link Sets New Time Records

It's a Small World, After All: Earth Is Not Expanding, NASA Research Confirms

Honeycomb Carbon Crystals Possibly Detected in Space

AIDS Researchers Isolate New Potent and Broadly Effective Antibodies Against HIV

Getting Inside the Mind (and Up the Nose) of Our Ancient Ancestors

Physicists Undo the 'Coffee Ring Effect'

Moon Younger Than Previously Thought, Analysis of Lunar Rock Reveals

Human Pathogen Killing Corals in the Florida Keys