Agriculture
Vitamin D-licious Mushrooms
Fast-flying fungal spores
Where Have All the Bees Gone?
Amphibians
Tree Frogs
Toads
Bullfrogs
Animals
From Chimps to People
The History of Meow
Spotting the World's Leggiest Animal
Behavior
Night of the living ants
The Electric Brain
A brain-boosting video game
Birds
Tropical Birds
Parakeets
Cassowaries
Chemistry and Materials
Makeup Science
Toxic Dirt + Avian Flu = Science Fair Success
Flytrap Machine
Computers
Galaxies on the go
Hitting the redo button on evolution
Electronic Paper Turns a Page
Dinosaurs and Fossils
Winged Insects May Go Way Back
Message in a dinosaur's teeth
The man who rocked biology to its core
E Learning Jamaica
2014 GSAT Results for Jamaican Kids
Results of GSAT are in schools this week
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
A Grim Future for Some Killer Whales
The Pacific Ocean's Bald Spot
Challenging the Forces of Nature
Environment
City Trees Beat Country Trees
Ready, unplug, drive
Sounds and Silence
Finding the Past
A Volcano's Deadly Ash
Traces of Ancient Campfires
Big Woman of the Distant Past
Fish
Freshwater Fish
Tilapia
Electric Catfish
Food and Nutrition
Strong Bones for Life
Making good, brown fat
Allergies: From Bee Stings to Peanuts
GSAT English Rules
Capitalization Rules
Order of Adjectives
Adjectives and Adverbs
GSAT Exam Preparation Jamaica
Mastering The GSAT Exam
Tarrant High overcoming the odds
Scotiabank Jamaica Foundation Grade Six Achievement Test (GSAT) Scholarships
GSAT Exams Jamaica Scholarships
42,000 students will sit for the GSAT Exam in two weeks
GSAT Scholarship
GSAT Practice Papers | GSAT Mathematics | Maths
GSAT Mathematics
Math and our number sense: PassGSAT.com
Prime Time for Cicadas
GSAT Practice Papers | GSAT Mathematics | Maths
Human Body
Smiles Turn Away Colds
From Stem Cell to Any Cell
The tell-tale bacteria
Invertebrates
Sponges
Butterflies
Invertebrates
Mammals
Chinchillas
Sphinxes
Wolves
Parents
What Not to Say to Emerging Readers
Expert report highlights the importance to parents of reading to children!
How children learn
Physics
IceCube Science
The Pressure of Scuba Diving
Electric Backpack
Plants
City Trees Beat Country Trees
Stalking Plants by Scent
Tracking the Sun Improves Plant Pollen
Reptiles
Snakes
Pythons
Turtles
Space and Astronomy
A Dusty Birthplace
Planning for Mars
Chaos Among the Planets
Technology and Engineering
Spinach Power for Solar Cells
Are Propellers Fin-ished?
Crime Lab
The Parts of Speech
What is a Verb?
Problems with Prepositions
What is a Noun
Transportation
Are Propellers Fin-ished?
Charged cars that would charge
Middle school science adventures
Weather
Catching Some Rays
Warmest Year on Record
The solar system's biggest junkyard
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™