Protecting Cows—and People—from a Deadly Disease
Fast-flying fungal spores
Growing Healthier Tomato Plants
Salamanders and Newts
Tree Frogs
Color-Changing Bugs
Polly Shouldn't Get a Cracker
Killer Flatworms Hunt with Poison
Two monkeys see a more colorful world
Longer lives for wild elephants
Mind-reading Machine
Flightless Birds
Chemistry and Materials
The solar system's biggest junkyard
Sugary Survival Skill
Supergoo to the rescue
The Earth-bound asteroid scientists saw coming
Lighting goes digital
Hubble trouble doubled
Dinosaurs and Fossils
A Really Big (but Extinct) Rodent
Three strikes wiped out woolly mammoths
Winged Insects May Go Way Back
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Results of GSAT are in schools this week
Less Mixing Can Affect Lake's Ecosystem
Groundwater and the Water Cycle
Polar Ice Feels the Heat
Indoor ozone stopper
City Trees Beat Country Trees
The Wolf and the Cow
Finding the Past
A Long Haul
Writing on eggshells
A Big Discovery about Little People
Nurse Sharks
Food and Nutrition
How Super Are Superfruits?
Food for Life
The Color of Health
GSAT English Rules
Who vs. That vs. Which
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
Mastering The GSAT Exam
Tarrant High overcoming the odds
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
2014 GSAT Results for Jamaican Kids
GSAT Exam Preparation
GSAT Mathematics
Math is a real brain bender
Prime Time for Cicadas
How a Venus Flytrap Snaps Shut
Human Body
A Fix for Injured Knees
Cell Phone Tattlers
Smiles Turn Away Colds
Raise a Lifelong Reader by Reading Aloud
What Not to Say to Emerging Readers
Children and Media
Invisibility Ring
Road Bumps
Thinner Air, Less Splatter
When Fungi and Algae Marry
Flower family knows its roots
Surprise Visitor
Boa Constrictors
Space and Astronomy
Rover Makes Splash on Mars
Wrong-way planets do gymnastics
A Galaxy Far, Far, Far Away
Technology and Engineering
Crime Lab
Squeezing Oil from Old Wells
Toy Challenge
The Parts of Speech
What is a Verb?
Adjectives and Adverbs
What is a Noun
Ready, unplug, drive
Morphing a Wing to Save Fuel
Are Propellers Fin-ished?
Catching Some Rays
Science loses out when ice caps melt
The Best Defense Is a Good Snow Fence
Add your Article

Galaxies Divide Sharply Along Color Lines

When most people look at the night sky, they see lots of twinkling white spots. In fact, stars come in a variety of colors, from red to blue. And like soccer teams at a tournament, galaxies seem to organize themselves by hue. Astronomers now report that old, red galaxies clump together much more tightly than do young, blue ones. And there doesn't seem to be any middle ground. The astronomers, from Johns Hopkins University in Baltimore, used data from the Sloan Digital Sky Survey. It's the largest survey of galaxies ever done, with about 50 million galaxies already viewed. The Sloan survey, which uses a telescope in New Mexico, is also unique because it sorts galaxies by color. Old galaxies look red because old, cooler stars give off mostly red light. Young galaxies are full of hot stars that formed more recently and still give off bluish light. After analyzing 2 million galaxies, the researchers noticed two distinct types of galaxy clumping: very tight or very loose, based on age and color. The new finding about galaxy distribution and color might help explain some things about what happens to galaxies as they get older. It might also provide hints about dark matter—mysterious stuff that may fill the Universe, according to some astronomers, even though no one has ever seen it.—E. Sohn

Galaxies Divide Sharply Along Color Lines
Galaxies Divide Sharply Along Color Lines

Designed and Powered by™