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Posts Tagged ‘scientists’

The Adventure of Links: October 18, 2010

October 18, 2010 Leave a comment

I know, I know. I missed last weeks Adventure of Links. And the week before too…but theres some great stuff this week so check it out.

Health

More anti-vaccine crap disguising itself as “Vaccine Safety Activism” on the Huff Po. Now they are trying to portray themselves as the underdogs to gain public support.

Acupuncture can apparently cure 461 diseases. It won’t be long before it can cure-all of them!

Anti-vaccination Network stripped of its charitable status.

Why weight loss supplements are not always “all-natural”.

First human clinical trial using stem cells begins.

Cool

The T-rex was a cannibal. They were probably easy prey, what with those tiny arms and all.

Worlds longest tunnel (57 km) being completed in Switzerland.

Khagendra Thapa Magar was crowned as the worlds smallest man, measuring up at 26.4 inches tall.

The epic 10 000 km journey of a single humpback whale is documented.

Fun/Funny

Michael J. Fox reshoots the original Back to the Future trailer.

What do you get the person who has everything? Why, an $8 million iPhone of course.

On why opening beer bottles with your teeth may not be a good idea.

A cool little demo of how the abrupt change in direction of a baseball during a curve ball is a bit of an optical illusion.

Women like to cuddle after sex. Men don’t. They needed a study to show this.

Physics and Astronomy

NASA photographs the aftermath of two asteroids colliding.

Physicists observe an electron being ejected from an atom for the first time.

The Universe could end in 3.7 billion years. Better hook up with that cute neighbour now before it’s too late.

Why does spaghetti always break in 3 or more pieces? Why do these problems give physicists such problems?

Science is self-correcting, as proven in this slide show of some scientific announcements that may have jumped the gun a bit.

 

 

 

Did We Really Find an Earth-Like Planet?

September 30, 2010 2 comments

Distant Planet “Could Have Life”

New Planet May be Able to Nurture Organisms

Astronomers Discover ‘Goldilocks’ Planet that Could Be Just Right For Life

1st Habitable Distant Planet Found

Yup, we have all seen the headlines. Now it’s just a matter of time before the aliens descend upon us. Or is it?

Astronomers can actually tell if a planet is orbiting a star by looking at the light of the star itself. As the planet orbits, it tugs on the star ever-so-slightly. This causes the light emitted by the star to be doppler-shifted. Basically this means that the colour of the star changes as the planet orbits.

By looking at how much the colour of the star changes, and how often it changes, we can tell how big the planet is, and how far away from the parent star it is.

That’s pretty freakin’ amazing if you think about it. And now, astronomers have announced that there is a planet roughly 3 times the size of the Earth orbiting a star called Gliese 581, a red dwarf star roughly 20 light years away. The planet is called Gliese 581g.

Artists impression of Gliese 581g. Credit: NSF

What is making this headline news is that the planet is orbiting the star in the so-called “Goldilocks” zone. A distance which is just far enough from the star that liquid water could exist on the surface. Many scientists believe that liquid water is essential to the development of life. THAT’S whats gotten the media’s attention.

While I hate to cheapen the importance of this discovery, because it is important, we shouldn’t start panicking about a possible alien invasion just yet.

The only things we are sure of is that the planet is roughly 3 times the size of Earth, and orbits about 1/6 of the distance of the Earth from the Sun. That’s all. Yes, it is possible that liquid water could exist on the surface. This means that it is possible that life could develop on the planet, at some point. But we don’t know that, its just speculation.

Phil Plait also wrote about this on Bad Astronomy. It’s important to clarify what the scientists have actually discovered, and what the news outlets put into their articles. He also points out that perhaps the most important thing about this discovery is that 1) we can detect planets roughly the size of the Earth and 2) that if we can find Earth-size planets only 20 light years from Earth, it is very possible that our galaxy is teeming with planets. Very, very exciting.

For those interested, here is a link to the .pdf of the paper detailing the discovery of the planet. Like I said, it’s a pretty cool discovery, but we haven’t found the Klingon homeworld just yet.

Klingon homeworld of Kronos