Agriculture
Springing forward
Seeds of the Future
Microbes at the Gas Pump
Amphibians
Tree Frogs
Salamanders
Bullfrogs
Animals
Lives of a Mole Rat
Putting a Mouse on Pause
Killer Flatworms Hunt with Poison
Behavior
Babies Prove Sound Learners
Fighting fat with fat
Ear pain, weight gain
Birds
Parakeets
Pheasants
Birds We Eat
Chemistry and Materials
The memory of a material
Smelly Traps for Lampreys
Pencil Thin
Computers
A New Look at Saturn's rings
Secrets of an Ancient Computer
The science of disappearing
Dinosaurs and Fossils
An Ancient Spider's Web
Digging Dinos
Hall of Dinos
E Learning Jamaica
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Earth
In Antarctica watch the heat (and your step)
Shrinking Glaciers
Killer Space Rock Snuffed Out Ancient Life
Environment
Hazy with a Chance of Sunshine
Spotty Survival
Giant snakes invading North America
Finding the Past
Big Woman of the Distant Past
If Only Bones Could Speak
Chicken of the Sea
Fish
Carp
Perches
Skates and Rays
Food and Nutrition
Yummy bugs
The Color of Health
In Search of the Perfect French Fry
GSAT English Rules
Subject and Verb Agreement
Who vs. Whom
Order of Adjectives
GSAT Exam Preparation Jamaica
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
GSAT stars reap scholarship glory
Ministry of Education Announces 82 GSAT Scholarships for 2010
GSAT Exams Jamaica Scholarships
GSAT Scholarship
GSAT stars reap scholarship glory
Results of GSAT are in schools this week
GSAT Mathematics
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Detecting True Art
Setting a Prime Number Record
Human Body
Remembering Facts and Feelings
A Long Trek to Asia
Sea Kids See Clearly Underwater
Invertebrates
Scallops
Fleas
Lice
Mammals
Caribou
Chihuahuas
Bandicoot
Parents
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
How children learn
Physics
Dreams of Floating in Space
Invisibility Ring
The Pressure of Scuba Diving
Plants
Flower family knows its roots
Underwater Jungles
Seeds of the Future
Reptiles
Garter Snakes
Gila Monsters
Caimans
Space and Astronomy
Ready, Set, Supernova
A Dead Star's Dusty Ring
Pluto, plutoid: What's in a name?
Technology and Engineering
Machine Copy
Spinach Power for Solar Cells
Musclebots Take Some Steps
The Parts of Speech
Countable and Uncountable Nouns
Problems with Prepositions
Pronouns
Transportation
Robots on a Rocky Road
Ready, unplug, drive
Tinkering With the Basic Bike
Weather
Recipe for a Hurricane
Science loses out when ice caps melt
The solar system's biggest junkyard
Add your Article

No Fat Stars

There's a limit to how big most things can get. Some people are really tall, but no one is as tall as a house. Cats can get really fat, but there's never been a tabby as heavy as a truck. And so on. Now, astronomer Don Figer of the Space Telescope Science Institute in Baltimore has discovered that the size of a star may have a limit, too. No stars in our galaxy, he estimates, can weigh more than 150 times the mass of our sun. This conclusion comes from observations of an area near the center of the Milky Way called the Arches cluster. The cluster is between 2 million and 2.5 million years old, and stars are still forming there. It contains about 2,000 stars. Figer thought that the Arches cluster would be a good place to search for the galaxy's biggest stars because it's still fairly young. Massive stars have short lives, so it wouldn't make sense to look at a cluster that was much older than Arches. It also wouldn't make sense to look at much younger ones because stars in young clusters are still hideen behind gas and dust. The Arches cluster was also promising because it's big. Its total mass is that of about 10,000 suns. In theory, it could hold at least 18 stars weighing more than 130 times the mass of the sun. Using the Hubble Space Telescope to gauge the weight of hundreds of stars in the Arches cluster, Figer found no stars this big. This means, he concluded, that there must be an upper limit to the size of a star—perhaps about 150 times the sun's mass. Astronomers are just beginning to understand the processes behind star birth. No one yet knows what determines the limits on their growth. Figer plans to study clusters of different ages to find out more.—E. Sohn

No Fat Stars
No Fat Stars








Designed and Powered by HBJamaica.com™