planetary nebula
esiegel | December 23, 2013"A sister is both your mirror - and your opposite." -Elizabeth Fishel
With 110 deep-sky wonders to choose from in the Messier catalogue, our long-running series on Messier Monday promises to keep us busy for some time to come! As we've finally passed the winter solstice here in the Northern Hemisphere, many new spectacular sights await skygazers in the early part of the night. As it's also the 1-year anniversary of when we adopted a little sister for our dog from the local humane society, I thought it would only be fitting to highlight the little sister to last week's Messier object.
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esiegel | July 1, 2013"One Ring to rule them all, One Ring to find them,
One Ring to bring them all and in the darkness bind them" -J.R.R. Tolkien
Every Monday has been devoted to our ongoing series on Messier's objects for nearly a year now, and we've covered some spectacular objects, from open star clusters to spiral galaxies, from globular clusters to giant ellipticals, from star-forming nebulae to the rare starburst galaxy, and from the lone supernova remnant to Messier's greatest mistake. With 110 deep-sky wonders to choose from, each one tells its own unique story.
Image credit: Mike Keith of http://cadaeic…
esiegel | January 28, 2013"A wise old owl lived in an oak
The more he saw the less he spoke
The less he spoke the more he heard.
Why can’t we all be like that wise old bird?" -The Immortal Poet Bromley
To your naked eye, the night sky appears littered with thousands of individual points of light: the stars and planets so familiar to us. But through even a small telescope or a pair of binoculars, not only do the number of visible stars increase into the hundreds-of-thousands or even the millions, but a slew of deep-sky objects become visible to us as well. Each monday, we highlight one of the deep-sky objects from…
esiegel | October 11, 2012"A colour is a physical object as soon as we consider its dependence, for instance, upon its luminous source, upon other colours, upon temperatures, upon spaces, and so forth." -Ernst Mach
Our Sun, like all Sun-like stars, will come to the end of its life someday. All the hydrogen fuel in its core will eventually burn up, and when this happens, the core itself will begin to contract. When temperatures are finally high enough, the end product of hydrogen fusion -- Helium-4 -- will begin to fuse in the contracted core, and the Sun will expand into a Red Giant.
Image credit: Northwestern…
esiegel | October 1, 2012"Man alone is born crying, lives complaining, and dies disappointed." -Samuel Johnson
But the stars, as opposed to humans, are born shining, with hundreds (or more) of brothers and sisters, shine ever more brightly over their lifetimes, and die in spectacular fashion. As far as we can tell, here's the past, present and future story of all the Sun-like stars in our galaxy.
Bok Globule Barnard 175; image credit by Jerry Lodriguss of http://www.astropix.com/.
At some point in the far distant past, every star in our galaxy was once no more than a molecular cloud of gas, with gravity attempting…
esiegel | May 28, 2012"Everyone must leave something behind when he dies, my grandfather said. A child or a book or a painting or a house or a wall built or a pair of shoes made. Or a garden planted. Something your hand touched some way so your soul has somewhere to go when you die, and when people look at that tree or that flower you planted, you're there." -Ray Bradbury
Today is Memorial Day here in the United States, where we honor all the soldiers who have fought and fallen for our country. The peace and prosperity that I have enjoyed my entire life is because of a price paid, many times over, mostly by people…