Zoom in to centre of the Milky Way

Videonummer 11927029
Zoom in towards the centre of the Milky Way galaxy. The Milky Way is a spiral galaxy that contains the Solar System. From Earth (at the start), the Milky Way appears as a band of light crossing the sky. The centre of the Milky Way lies in the direction of the constellation Sagittarius. Zooming in on this region reveals progressively more detail. Objects at the centre of the Milky Way are obscured from Earth at optical wavelengths by the large amount of gas and dust present in the disc of the galaxy. At infrared wavelengths, though, the dust is transparent. This allows observation of stars very close to the centre. Their short, fast orbits (blue lines) around the centre have ben calculated from observations, which permits the mass of the central object (black circle) to be calculated. Its mass and density imply that it can only be a supermassive black hole. The centre of the Milky Way lies around 25, 000 light years from Earth.<br>Restrictions:
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Credit: Science Photo Library / EUROPEAN SOUTHERN OBSERVATORY
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Länge: 57 Sekunden
Seitenverhältnis: 16:9
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