Hubble spies rare cosmic tadpole galaxy The Hubble telescope has captured images of a rare tadpole galaxy glittering with bursts of star formation, swimming in the black pond of space. In a collaboration between NASA and the European Space Agency, the telescope was used to take high-resolution images of cosmic objects across a range of wavelengths. Hubble has taken …
Hello, Pompous Git
That's not that hard to work out, and not that a revolutionary measure of rotational speed.
Our galaxy does things like this:
Our solar system orbits the center of the Milky Way galaxy. Our sun and solar system move at about 800 thousand kilometers an hour – that’s about 500 thousand miles an hour – in this huge orbit. So in 90 seconds, for example, we all move some 20,000 kilometers – or 12,500 miles – in orbit around the galaxy’s center.
It takes the sun approximately 225-250 million years to complete one journey around the galaxy’s center
And as far as I remember our galaxy moves at 2 million km/h (somewhere).
.
Hello Lars
If we assume the very centre of the disk (actually a hole) is stationary relative to the universe, then its linear motion is 0 km/h. Its rotational speed is however 33 1/3 rpm. The edge of the disk is also rotating at 33 1/3 rpm, but its linear motion is X km/h where X=some positive value I can't be arsed calculating. There would appear to be an infinite number of points on the disk moving at an infinite number of different speeds. Simpler methinks to express rotational values as rotations per unit of time than as some arbitrary linear speed.
The Register 
Biting the hand that feeds IT
Copyright. All rights reserved © 1998–2024
