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27th Nov 2005

Stars, Cosmology and the Beginning of the Universe


Chris Smith

Kat Arney

This week we dive into deep time as cosmologist Dr Mike Hobson from Cambridge University explains how we measure the universe and answers a host of astronomically hard questions, Dr Chris Voigt from the University of California in San Francisco describes his E. coli-cam, a bacterial camera with a resolution of 100 mega-pixels, and Derek and Dave cook up a treat in this week's Kitchen Science.

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News

 

Marine Mammals Seal a Deal With Oceanographers

A team of oceanographers led by Mike Fedak from the Sea Mammal Research Unit at St Andrews University in Scotland have recruited a new breed of assistants to help them study remote polar waters - seals. Traditionally, studies of the oceans, which can help in w...


Questions

 

Why is it that we like drinks with gas, like beer or coke? If we drink these beverages without it, they taste bad, but gas is tasteless. What effect do bubbles have? Is it just down to the sensation?


 

What's gravity made of?


 

Is it true that someone's head would explode if you went out into space without a helmet on?


 

Is it possible to see a gamma ray burst in the sky? I saw something in the sky flash on and off one night.


 

We're told that photons can't escape from a black hole, and I was wondering if gravitons can escape from a black hole? If so, what are the consequences of that?


 

How far is the nearest galaxy?


 

How do scientists check the distances between planets, and how accurate are their methods?


 

From a scientific rather than a religious point of view, why should there be a universe? Why isn't there just nothing?


 

How do scientists measure the life of the sun?


 

How many human years are there in a light year?


 

If our weight is the difference between gravity and the centrifugal force of the Earth's rotation, why are we not crushed at either pole area?



Kitchen Science

 

Crisp Packet Fireworks

Produce fireworks in your kitchen, using nothing more than a crisp packet and a humble microwave.







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