Posts Tagged: dark

Cornish Skies in Autumn

04 October 2016

One of the myriad reasons that we opted to build the telescope at Caradon observatory was the possibility of coordinating with the optical telescopes on site and producing simultaneous data in both the visible and radio. Although 21cm emission itself is not effected by the skyglow of nearby civilisation, the optical observatories on the site are. This is…READ MORE

The Hydrogen Line V: Dark Matter

10 March 2014

In the last post we talked about using Newtons theory of gravity to calculate the mass of the Milky Way using the velocity of hydrogen clouds which we can measure with XRT-S. An example of this data from another similar project is shown below. This is called a rotation curve and plots the measured orbital…READ MORE