Agriculture
Silk’s superpowers
Fast-flying fungal spores
Hungry bug seeks hot meal
Amphibians
Frogs and Toads
Toads
Bullfrogs
Animals
Little Beetle, Big Horns
New Monkey Business
Fishy Cleaners
Behavior
A Grim Future for Some Killer Whales
Making Sense of Scents
Fear Matters
Birds
Tropical Birds
Hummingbirds
Crows
Chemistry and Materials
Small but WISE
Gooey Secrets of Mussel Power
Fog Buster
Computers
Play for Science
Electronic Paper Turns a Page
Nonstop Robot
Dinosaurs and Fossils
Dino Bite Leaves a Tooth
Fingerprinting Fossils
Ferocious Growth Spurts
E Learning Jamaica
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
Earth
Farms sprout in cities
A Global Warming Flap
Digging into a Tsunami Disaster
Environment
Power of the Wind
Pumping Up Poison Ivy
A Newspaper's Hidden Cost
Finding the Past
A Human Migration Fueled by Dung?
Settling the Americas
Unearthing Ancient Astronomy
Fish
Mahi-Mahi
Electric Ray
Eels
Food and Nutrition
Symbols from the Stone Age
Chocolate Rules
Packing Fat
GSAT English Rules
Problems with Prepositions
Pronouns
Finding Subjects and Verbs
GSAT Exam Preparation Jamaica
42,000 students will sit for the GSAT Exam in two weeks
March 21-22, 2013: Over 43,000 students will take the GSAT Exam
GSAT Exam Preparation
GSAT Exams Jamaica Scholarships
GSAT Scholarship
42,000 students will sit for the GSAT Exam in two weeks
GSAT stars reap scholarship glory
GSAT Mathematics
GSAT Practice Papers | GSAT Mathematics | Maths
Losing with Heads or Tails
Detecting True Art
Human Body
A Sour Taste in Your Mouth
From Stem Cell to Any Cell
Opening a Channel for Tasting Salt
Invertebrates
Shrimps
Caterpillars
Praying Mantis
Mammals
Moose
Poodles
Blue Bear
Parents
How children learn
Choosing a Preschool: What to Consider
The Surprising Meaning and Benefits of Nursery Rhymes
Physics
Gaining a Swift Lift
Project Music
Thinner Air, Less Splatter
Plants
White fuzzy mold not as friendly as it looks
Stalking Plants by Scent
Underwater Jungles
Reptiles
Garter Snakes
Copperhead Snakes
Geckos
Space and Astronomy
Cool as a Jupiter
Sounds of Titan
A Great Ball of Fire
Technology and Engineering
Young Scientists Take Flight
Machine Copy
Musclebots Take Some Steps
The Parts of Speech
Countable and Uncountable Nouns
Problems with Prepositions
What is a Noun
Transportation
Robots on a Rocky Road
Tinkering With the Basic Bike
Reach for the Sky
Weather
Where rivers run uphill
Antarctica warms, which threatens penguins
Weekend Weather Really Is Different
Add your Article

An Icy Blob of Fluff

The collision between a projectile, launched from the spacecraft Deep Impact, and Comet Tempel 1 on July 4th was pretty exciting. But the excitement didn't end there. Astronomers continue to analyze data from the event, and early findings reveal lots of new information about comets and the formation of our solar system. Some 80 telescopes on the ground and in space monitored and recorded the crash. Scientists have been analyzing these images, most of which feature the dust that blew off the comet for 2 days after the crash. Initial observations suggest that scientists are for the first time "directly measuring pristine material from deep inside a comet, material that has been locked away since the beginnings of the solar system," says Deep Impact researcher Carey Lisse. He's at the University of Maryland and the Johns Hopkins Applied Physics Laboratory. Some of the results have been surprising. For one thing, scientists had long thought of comets as dirty snowballs—clumps of ice with bits of dust mixed in. Tempel 1, however, seems to be more of an icy dirtball. The deep crater that formed after impact suggests that the comet is made up mostly of very fine dust, with some ice mixed in. Gravity holds the comet together only weakly, which makes it fragile and fluffy. The comet is so fluffy that about 80 percent its volume is empty space. Nor does the comet consist of chunks of material squished together into one solid, as previously thought. Instead, it's layered like an onion, say astronomers on the Deep Impact team. Figuring out how comets are put together should help astronomers understand how planets are created. Comets most likely formed 4.5 billion years ago, when the rest of the solar system was also born. Yet comets have experienced less heating and melting than planets and asteroids, so they hold insights about those early days. Cameras captured great close-up pictures of the comet, and astronomers continue to marvel at Tempel 1's many craters, which suggest a battered life. Images also show smooth surfaces and tall cliffs that scientists can't yet explain. As they continue with their measurements, calculations, and observations, astronomers hope eventually to get at the heart of what comets can tell us about the history of our solar system.—E. Sohn

An Icy Blob of Fluff
An Icy Blob of Fluff








Designed and Powered by HBJamaica.com™