Agriculture
Keeping Bugs Away from Food
Earth-Friendly Fabrics
Treating peanut allergy bit by bit
Amphibians
Frogs and Toads
Bullfrogs
Newts
Animals
Poor Devils
New Elephant-Shrew
Fishing for Giant Squid
Behavior
Newly named fish crawls and hops
Fear Matters
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
Birds
Seagulls
Kingfishers
Turkeys
Chemistry and Materials
Meteorites may have sparked life on Earth
Nanomagnets Corral Oil
Earth-Friendly Fabrics
Computers
Hubble trouble doubled
Small but WISE
Games with a Purpose
Dinosaurs and Fossils
Battling Mastodons
Hunting by Sucking, Long Ago
Watery Fate for Nature's Gliders
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
Deep Drilling at Sea
Vitamin D-licious Mushrooms
Less Mixing Can Affect Lake's Ecosystem
Environment
The Best Defense Is a Good Snow Fence
Indoor ozone stopper
Spotty Survival
Finding the Past
Big Woman of the Distant Past
A Long Trek to Asia
A Plankhouse Past
Fish
Mahi-Mahi
Flounder
Nurse Sharks
Food and Nutrition
How Super Are Superfruits?
Making good, brown fat
Turning to Sweets, Fats to Calm the Brain
GSAT English Rules
Who vs. Whom
Whoever vs. Whomever
Problems with Prepositions
GSAT Exam Preparation Jamaica
The Annual GSAT Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
Tarrant High overcoming the odds
GSAT Exams Jamaica Scholarships
GSAT Exam Preparation
GSAT Scholarship
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
Play for Science
How a Venus Flytrap Snaps Shut
42,000 students will sit for the GSAT Exam in two weeks
Human Body
Cell Phones and Possible Health Hazards
Remembering Facts and Feelings
From Stem Cell to Any Cell
Invertebrates
Flatworms
Dragonflies
Crawfish
Mammals
Cougars
Primates
Pekingese
Parents
What Not to Say to Emerging Readers
How children learn
Expert report highlights the importance to parents of reading to children!
Physics
Extra Strings for New Sounds
One ring around them all
Hold on to your stars, ladies and gentlemen
Plants
Nature's Alphabet
Springing forward
Plants Travel Wind Highways
Reptiles
Anacondas
Copperhead Snakes
Sea Turtles
Space and Astronomy
Asteroid Moons
A Smashing Display
Gravity Tractor as Asteroid Mover
Technology and Engineering
Riding Sunlight
Machine Copy
Toy Challenge
The Parts of Speech
Pronouns
Problems with Prepositions
What is a Preposition?
Transportation
Reach for the Sky
Revving Up Green Machines
Morphing a Wing to Save Fuel
Weather
A Dire Shortage of Water
The solar system's biggest junkyard
Either Martians or Mars has gas
Add your Article

Deep-space dancers

If you gaze through a telescope at a distant galaxy, it may glow brightly with the light of hundreds of millions of stars. Despite all that light, most scientists think that at the center of a big galaxy lies something very dark: a black hole. A black hole is a region of space with gravity so strong that nothing can escape, not even light. What’s even stronger than a black hole at the center of a galaxy? Try two black holes, spinning around each other like deep-space dancers. Astronomers recently announced they have observed a faraway galaxy that may have at its center two black holes, very close together. Todd Boroson and Tod Lauer, the astronomers who have been studying the galaxy, work with the National Optical Astronomy Observatory in Tucson, Arizona. Based on their observations, the stargazers suspect one of the black holes has more mass than the other. The more mass something has, the stronger its gravitational force, so a larger black hole has a stronger gravitational attraction. This means a larger black hole pulls a smaller black hole toward it. The scientists’ measurements suggest that one of the black holes is as massive as 50 million suns; the other, smaller black hole is about the weight of 20 million suns. The smaller black hole orbits the larger black hole, just as Earth orbits the sun, or the moon orbits Earth. The two black holes are separated by about 2 million million miles, or one-third of a light-year. That may seem like a long way, but in outer space that’s like standing face to face. You might think of a black hole as a giant whirlpool in space. If you’re in a spacecraft and you get too close, there’s no way to get out: You just move closer and closer to the black hole’s center. Now try to imagine two whirlpools, the smaller moving around the larger. It may be interesting to see, but steer clear! The biggest galaxies in the universe form when two smaller galaxies collide. If two galaxies merge, then all of their stars start orbiting a common center. The black holes at the galaxies’ centers should come together, too. Galaxies are colliding all the time, so we should be able to find lots of black hole pairs. But that’s easier said than done — astronomers rarely find these duos in deep space. To find a black hole — much less two — is complicated. A black hole doesn’t produce any light, so how can you find one in space? Astronomers think that when something (like dust) falls into a giant black hole, a jet of radiation, a form of energy, may stream away. If this radiation is strong enough, it forms a quasar — a bright space object that surrounds the black hole like a shell. By looking at quasars, scientists hope to learn more about black holes. The Arizona astronomers looked at more than 17,000 quasars and finally found a galaxy that may have a double black hole at its heart. But they’re not sure yet — their research is still unconfirmed, and they may be mistaken. To confirm their suspicions, the scientists will keep taking measurements of the quasar. “This is a candidate, not a proven, binary black hole,” says Lauer.

Deep-space dancers
Deep-space dancers








Designed and Powered by HBJamaica.com™