As I mentioned in a previous post, there are a few ways to measure the distance of a star in our galaxy. Unfortunately when the Luminosity is unknown and it is too far away to use parallaxes method, we are stumped for ways to estimate the distance.
Once in a while though we get lucky and we have events that allow us to calculate distance in other ways. Circinus X-1 is one of these events. Circinus X-1 is an x-ray binary; an x-ray binary is a system of two stars where material from one companion is accreting on the neutron star, which in turns emits x-rays.
The Oceanus Procellarum (Ocean of Storms) is the largest of the lunar maria (seas) covering roughly 4 million square kilometers (about the surface area of the EU). Its wide flat basaltic surface was believed to be the result of a major impact on the Moon surface in the early days of our satellite, which was […]
Saoussen Mbarek and Manu Paranjape at the Université de Montréal in Canada have published a paper that details the conditions for negative mass to exist in our Universe without the need to include exotic particles. In their calculations negative mass is allowed in the General Relativity solution of a Schwarzschild-De Sitter geometry. This geometry corresponds […]
Dutch Astronomers using ESO’s Very Large Telescope were able to measure the rotational speed of a planet outside the Solar System for the first time. Ignas Snellen and his colleagues at Leiden University in the Netherlands used infrared light and its absorption in the planet atmosphere to calculate the length of the day of β Pictoris b.
A pulsar is a highly magnetised fastly rotating neutron star which formed during a supernova explosion. The name pulsar is a portmanteau for pulsating star, because it emits a beam of electromagnetic radiation usually in radio, x-ray or gamma-ray light. They were first discovered by Jocelyn Bell Burnell and Antony Hewish in 1967, when they […]
What are magnetic monopoles and why are they important? If you ever broke a magnet in two when you were little (I was a weird kid, leave me be) you might have noticed that you would have two perfectly working magnets in your hands.