Archive for July, 2015

The equivalent of 1 erg

Posted July 28, 2015 By grigoris

A very common unit of energy in Astronomy is erg. There are stellar sources that emit up to 1040 erg/s (or even more for galaxies). But, how could we understand “how much” erg is? An interesting and funny example is given in the Wikipedia [1]: “An erg is approximately the amount of work done (or […]

June 2015 has been quite busy as I participated in two conferences: The Physics of Evolved Stars (Nice, France; June 8-12, 2015) – poster contribution Title: “Disk tracing for B[e] supergiants in the Magellanic Clouds” Abstract: “The B[e] supergiants are an important short-lived transition phase in the life of massive stars, in which enhanced mass-loss […]

Back to (my) school!

Posted July 18, 2015 By grigoris

On Thursday 14th of May 2015 I had the unique opportunity to give a talk about Astronomy at the high school I graduated from in Aigaleo (Athens, Greece). As I have moved away from Aigaleo since 2007 and my visits in Athens are scarce the least, it is difficult to think of such an event […]

NASA’s close look on Pluto (by Peblo)

Posted July 15, 2015 By grigoris

Even though New Horizons has just passed from Pluto and sent us some magnificent images, it didn’t manage to uncover all the details of Pluto. Luckily, PEBLO give us another great view of Pluto: