Today, Friday 15th February 2013. Russia’s Ural mountains. A fireball streaks through the clear morning sky. Loud bangs follow. A meteor crashes in Russia about 1,500 kilometres (930 miles) east of Moscow. As the shockwave blows out windows and rocks buildings, it injures at least 950 people, the BBC News reports. Most of those hurt from the Chelyabinsk region where the meteor fell, suffered cuts and bruises.
Black holes are known to exist at the centres of most galaxies, including our own Milky Way. The masses of those black holes are correlated to many of the properties of their host galaxies, which strongly suggests that galaxies and black holes evolve together. Measuring their masses and comparing them in a variety of different galaxies is crucial to the understanding of the interactions between the two components.
Light. Most of us take it for granted during the day. And at night, we have learned to domesticate it. Light, the natural agent that stimulates our sense of sight and makes things around us visible.
Continue reading Let There Be Light…
Early astronomers already make the distinction between stars and planets, as the former remain relatively fixed for centuries, while the latter wander an appreciable amount in a comparatively short time. But that’s not all!
Continue reading World Views
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