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class="wp-caption-text">(Caption) The center of the Milky Way containing Sagittarius A*. The supermassive black hole and several massive young stars in the region create a surrounding haze of superheated gas that shows up in X-ray light. Credit: chandra.harvard.edu and Kyoto University.
Many an alternative theory of gravity has been dreamt up in the bath, while waiting for a bus – or maybe over a light beverage or two. These days it?s possible to debunk (or otherwise) your own pet theory by predicting on paper what should happen to an object that is closely orbiting a href="http://www.universetoday.com/46443/black-hole/" class="alinks_links" title="" rel="external">black hole ? and then test those predictions against observations of href="http://en.wikipedia.org/wiki/S2_%28star%29">S2 and perhaps other href="http://www.universetoday.com/24184/stars/" class="alinks_links" title="" rel="external">stars that are closely orbiting href="http://www.universetoday.com/32288/first-extra-galactic-planet-may-have-been-detected/" class="alinks_links" title="" rel="external">our galaxy?s central href="http://www.universetoday.com/42049/supermassive-black-hole/" class="alinks_links" title="" rel="external">supermassive black hole – thought to be situated at the radio source href="http://en.wikipedia.org/wiki/Sagittarius_A*">Sagittarius A*.(...)
Read the rest of href="http://www.universetoday.com/72315/astronomy-without-a-telescope-galactic-gravity-lab/">Astronomy Without A Telescope – Galactic Gravity Lab (573 words)
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