Article by: Gavin Ramsay Unlike our Sun, around half of all stars have another stellar companion. The closest stars to the Sun are two bright southern stars, alpha Centauri A and B, which orbit each other every 80 years and Proxima Centauri which orbits A and B every few tens Read more…
Before addressing Black Hole sizes, we should first go back to see what astronomers mean when they use the term “Black Hole”. This may be easiest to understand when considering the end products of stars.
The hottest February day ever in Armagh.
Michael Burton, Director of the Armagh Observatory and Planaterium Monday January 21, 2019 – the last chance to watch a total eclipse of the Moon from Armagh for over a decade. Should we hold a special viewing session to give people the chance of seeing this celestial wonder?! Easy question, Read more…
Article written by: Heather Alexander, Education officer At the Armagh Observatory and Planetarium we have been having a look at all the things that are going to happen throughout the year and trying to select some of the events that we are most looking forward to. Needless to say this Read more…
Here we are, on the count down to Christmas, and we’re having a look at all the Astronotes that have been written for our blog this year. We’ve had input not just from the Education Team this year, but also the Academic Staff of the Armagh Observatory and Planetarium.
With Space Exploration comes theories and conspiracies. In our latest blog we debunk some of the more infamous ones.
NASA has announced the retirement of the Kepler spacecraft. After launch in March 2009, it began a continuous observation of a 115 square degree field of view (the diameter of the moon is 1/2 a degree) between the constellations Cygnus and Lyra.
As had been reported on in an earlier Astronotes blog article, the International Astronomical Union was putting to the vote whether to change the name of the law relating to the expansion of the universe. Of the 11,000 professional astronomers entitled to vote on the motion, over 4,000 did. The Read more…
As an earlier Astronotes article reported on, during its XXX General Assembly in Vienna, held in August 2018, the International Astronomical Union (IAU) put forward a draft resolution to rename the Hubble law as the “Hubble–Lemaître law”. The resolution was proposed to recognise Lemaître’s research on the expansion of the Universe, and to pay tribute to both Lemaître and Hubble for their fundamental contributions to the development of modern cosmology.