17 July 2019
New measurement deepens mystery of Universe’s expansion rate
... in time via computer simulations to predict the present-day Hubble constant. The Cepheid method on the other hand, uses variable stars as distance markers. Cepheid variable stars are thousands of times more luminous than the Sun and by observing the...
02 August 2016
Astronomers detect large void in the centre of our Galaxy
... 10 and 300 million years old (compared with our Sun that is 4.6 billion years old.) Cepheids are variable stars and they undergo regular cycles of pulsation that causes their brightness to change in a very regular/periodic way. ...
26 April 2019
As mystery of the Universe’s expansion rate widens, a simple solution is offered
... stars called Cepheid variables in a neighbouring satellite galaxy known as the Large Magellanic Cloud (LMC). Cepheids ... method to calculate the Hubble Constant. Instead of observing one Cepheid at a time with NASA’s Hubble Space Telescope as it ...
