Monthly Archives: April 2019

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What is a Light Year?

2019-04-26T11:54:54+10:00

What is a Light Year? Although it sounds like a unit of time, a light year is actually a unit of distance. The distances in space are so huge, they require special units to measure them in. One light year is 9.46 trillion km, which is the distance that light travels in one year.  (It might feel strange to think of light as 'travelling' anywhere, because the speed of light is so fast we do not observe this in everyday life.) Pictured above is Proxima Centauri - the closest star to Earth after the Sun. It is 4.25 light years, [...]

What is a Light Year?2019-04-26T11:54:54+10:00

What Is A Black Hole?

2019-04-26T11:49:55+10:00

What is a Black Hole? A black hole is a region of space where the force of gravity is so extreme, everything – including light – cannot escape its pull. There are millions of ‘stellar’ black holes in the universe, formed by the collapse of giant stars. ‘Supermassive’ black holes, are far bigger, and are found at the centre of almost every galaxy.  We do not yet know how they form, however Albert Einstein predicted the existence of black holes in his theory of General Relativity over one hundred years ago. Einstein stated that objects with a massive gravitational force, [...]

What Is A Black Hole?2019-04-26T11:49:55+10:00

First EVER Picture Of A Black Hole

2019-04-26T11:34:03+10:00

This image of a black hole has turned scientific theory into scientific fact.. Until now, all ‘pictures’ of black holes have been the impressions of artists or the simulations of physicists.  On 10th April 2019, a team of over 200 scientists from around the world unveiled this image, formed from five petabytes (that’s five million gigabytes) of data they collected whilst ‘staring’ into a black hole. The team effort was called the Event Horizon Telescope or EHT project, and used the combined power and resolution of eight radio telescopes at six locations around the world – Hawaii, Chile, Arizona, Mexico, Spain and the South Pole. The [...]

First EVER Picture Of A Black Hole2019-04-26T11:34:03+10:00

Good news for chocolate lovers… Bad news for pets

2019-04-08T12:17:37+10:00

Researchers in the USA have found that eating dark chocolate has several benefits for both brain and body, according to the results of two new studies that were presented last year. Eating chocolate that is at least 70% cacao has positive effects on mood, memory, inflammation and immunity. One could almost say it reduces stress... but we knew that already, right?The effect of chocolate on cats and dogs, however, is very different. Chocolate can be poisonous to pets, due to the presence of a compound called theobromine. Humans can metabolise theobromine easily, but dogs and cats can not, resulting in a build-up of potentially toxic levels.Symptoms of [...]

Good news for chocolate lovers… Bad news for pets2019-04-08T12:17:37+10:00