Tag Archives: earth

Jellyfish Outbreak= Nature Out of Balance

So we’re seeing more Jellyfish around, but what does it mean?  Experts say that driven by overfishing and climate change, this is a sure sign of ecosystems out of kilter.

“Jellyfish are an excellent bellwether for the environment,” explains Jacqueline Goy, of the Oceanographic Institute of Paris. “The more jellyfish, the stronger the signal that something has changed.”

“Jellyfish both compete with fish for plankton food, and predate directly on fish,” explains Andrew Brierley from the University of St Andrews in Scotland. “It is hard, therefore, to see a way back for fish once jellyfish have become established, even if commercial fishing is reduced.”

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jellyfish

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The First Universe of Galaxies Map

Remember the spacecraft GALEX (which means Galaxy Evolution Explorer) that was sent to space with the mission of observing galaxies in ultraviolet light across 10 billion years of cosmic history through an incorporated telescope on April 28th of 2003? It’s now officially been traveling the space and sending information back to Earth for five years.

“GALEX’s ultraviolet observations are telling the scientists how galaxies, the building block of our Universe, evolve and change. GALEX observations are providing data for NASA’s investigators to find out when and how the stars that we see today were formed and which chemical elements are the galaxies made off.”

Now GALEX has already observed more than 100 million galaxies. The first comprehensive map of the Universe of galaxies is now ready for construction, helping us understand how galaxies like our own Milky Way were formed.

“In effect, GALEX acts like a time machine through which humans see the universe as it was a few billion years after its birth because it observes places so far away that the light reaching GALEX, even traveling at 299.792.458 meters per second is still the same as billions of years before.”

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Tourist space travel, not that far away?

Xcor Aerospace announced plans for a two-seater commercial spacecraft called the Lynx on Wednesday. It was also announced that Lynx could probably take its first test flight by 2010. The spacecraft would allow passengers to take a 25-minute spaceflight. “Our company’s goal has always been to build rocket-powered vehicles that can be flown like regular aircraft,” said company president Jeffrey Greason, who claims that the Lynx is relatively environmentally friendly: “They are fully reusable, burn cleanly, and release fewer particulates than solid-fuel or hybrid rocket motors,” he says.

tourist spacecraft