astronomy Newsletter


July 1 2014 Astronomy Newsletter

Hi everybody

Here's the latest article from the Astronomy site at

Lacaille's Skies - Sciences
There's a curious set of constellations in the southern skies. They don't represent exotic animals, heroic deeds or the foibles of ancient deities. They're composed of dim and nameless stars. Find out why Abbe Lacaille invented them, and take a quick tour.

*Cassini has been orbiting Saturn for 10 years*

Cassini went into orbit around Saturn on July 1, 2004, and has been sending home amazing images of the Saturnian system ever since. Here's one that ESA posted to celebrate the 10th anniversary: You can read more about the Cassini mission here:

*Happy Canada Day to Canadian readers*

Good wishes to everyone celebrating Canada Day today, July 1st. Just so your neighbors south of the border don't bag all the cosmic fireworks here's a really stunning supernova remnant for you:

*Happy 4th of July, USA*

It's the USA's national day of celebration. Here is my cosmic tribute - a bit of history and lots of fireworks.

*Happy Birthday, Henrietta Leavitt*

Henrietta Leavitt was an American astronomer who discovered the relationship between the apparent brightness of a Cepheid variable star and the period over which it varied. This has made it possible to work out the distances of distant objects which contain Cepheids. Edwin Hubble's work on the expansion of the Universe would have been impossible without Leavitt's work.

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I wish you clear skies.

Mona Evans, Astronomy Editor

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