Galaxies
esiegel | June 28, 2013"It's a wonderful world. You can't go backwards. You're always moving forward. It's the wonderful part about life. And that's terrific." -Harvey Fierstein
Yes, it's true. As stationary and secure as it seems when you plant your feet firmly on the ground, the reality is we are always moving through the cosmos.
Image credit: H.A. Rey, via Samuel J. Wormley of http://www.edu-observatory.org/.
About its axis, the Earth spins around once per day. Unless you're at the exact north or south pole of the planet, that means that you are in motion, too! The fastest-moving among us are located at the…
esiegel | June 10, 2013"It's coming right for us!" -Uncle Jimbo, from South Park
Welcome back to another Messier Monday, only here on Starts With A Bang! Each Monday, we take an in-depth look at one of the 110 deep-sky objects that make up the Messier Catalogue, the first accurate and comprehensive deep-sky catalogue of relatively bright, extended celestial objects that can be viewed with even the most primitive of skywatching equipment under good skies. Each one of these objects -- ranging from nebulae to star clusters to galaxies -- holds its own, unique story.
Image credit: © 2008 by Patrick Freeman of http://…
esiegel | May 27, 2013"Yes, indeed, if humankind — from humble farmers in the fields and toiling workers in the cities to teachers, people of independent means, those who have reached the pinnacle of fame or fortune, even the most frivolous of society women — if they knew what profound inner pleasure await those who gaze at the heavens, then France, nay, the whole of Europe, would be covered with telescopes instead of bayonets, thereby promoting universal happiness and peace." -Camille Flammarion
Welcome back to Messier Monday here on Starts With A Bang, where each Monday we take a detailed look at one of the 110…
esiegel | May 24, 2013"Do you see the absurdity of what I am? I can't even express these things properly because I have to - I have to conceptualize complex ideas in this stupid limiting spoken language! But I know I want to reach out with something other than these prehensile paws! And feel the wind of a supernova flowing over me!" -Ronald Moore
Well, you probably don't actually want to feel the wind of a supernova flowing over you; trust me on this.
Image credit: ESO / L. Calçada, of the remnant of SN 1987a.
But to find one for yourself, that's definitely within your reach, if you know where to look.…
esiegel | May 23, 2013“Because dark energy makes up about 70 percent of the content of the universe, it dominates over the matter content. That means dark energy will govern expansion and, ultimately, determine the fate of the universe.” -Eric Linder
It's been a while since we've spoken about dark energy, and we were just talking about Einstein's greatest blunder, so let's just dive right in.
Image credit: S. Beckwith & the HUDF Working Group (STScI), HST, ESA, NASA.
This is our observable Universe, as unveiled by the Hubble Space Telescope. With hundreds of billions of galaxies stretched out some 41…
esiegel | May 13, 2013"How is it they live for eons in such harmony - the billions of stars - when most men can barely go a minute without declaring war in their mind against someone they know?" -Thomas Aquinas
Welcome back to another Messier Monday here on Starts With a Bang! Each Monday, we take an in-depth look at one of the 110 deep-sky wonders -- all visible with a small telescope or even good binoculars -- that make up Charles Messier's original catalogue of non-cometary objects! Today, we're taking a look at a one-of-a-kind galaxy among the Messier objects, which just happens to be the (co-)first galaxy I…
esiegel | May 8, 2013"No valid plans for the future can be made by those who have no capacity for living now." -Alan Watts
"They do not see what lies ahead, when Sun has faded and Moon is dead." -J.R.R. Tolkien
One of the most amazing facts about the Universe is that, despite only having spent a few hundred years studying the fundamental constituents and forces of what makes us up, humanity has been able to accurately figure out just what all this actually is.
Image credit: ESO / S. Brunier.
The laws of nature are almost completely understood in a few, very important senses. We know that our Universe is about…
esiegel | April 24, 2013"Space is big. You just won't believe how vastly, hugely, mind- bogglingly big it is. I mean, you may think it's a long way down the road to the chemist's, but that's just peanuts to space." -Douglas Adams
Well, maybe "peanuts" isn't going to do. When you look out at the night sky, all sorts of objects are yours to discover, from our closest neighbors in the Solar System to the billions of stars in the Milky Way to the faint, extended and fuzzy galaxies stretching millions and billions of light years across the cosmos.
Image credit: Stephane Guisard, via http://sguisard.astrosurf.com/.
But…
esiegel | April 15, 2013"Upon one occasion, while engaged upon a seven-foot mirror, he did not remove his hands from it for 16 hours together." -from Caroline Herschel's obituary
Welcome to another Messier Monday here on Starts With A Bang! Each Monday, we highlight a different one of the 110 deep-sky objects that Messier catalogued so that comet-hunters wouldn't confuse these permanent fixtures with transient comets. But each object has a unique, remarkable story in its own right.
Image credit: The Messier Objects by Alistair Symon, from 2005-2009.
Out of the 110 objects, a full forty of them are galaxies…
esiegel | March 25, 2013"I wouldn't dream of working on something that didn't make my gut rumble and my heart want to explode." -Kate Winslet
Welcome back for another Messier Monday! At the start of each week, we take a detailed look at one of the 110 deep-sky objects that make up the Messier Catalogue. This week, we've got a very special happening in the night sky to introduce you to.
Image credit: Tenho Tuomi, Saskatchewan, Canada.
One of the most common class of object in the Messier Catalogue are galaxies external to our own Milky Way, which make up a whopping 40 of these 110 objects. Occasionally -- a little…
esiegel | March 11, 2013"When you run the marathon, you run against the distance, not against the other runners and not against the time." -Haile Gebrselassie
Welcome to a very special Messier Monday, which just happens to be the twenty-first consecutive week we've taken a look at one of the 110 fixed, deep-sky objects that Messier and his collaborators catalogued to avoid confusion with comets.
Image credit: Tenho Tuomi, of his completed Messier Marathon.
Today's Messier Monday is very special, because today is the new Moon closest to the vernal equinox. Each year, on (or very close to) the vernal equinox --…
esiegel | March 6, 2013"The atoms come into my brain, dance a dance, and then go out - there are always new atoms, but always doing the same dance, remembering what the dance was yesterday." -Richard Feynman
Here you are, a human being, a grand Universe of atoms that have organized themselves into simple monomers, assembled together into giant macromolecules, which in turn comprise the organelles that make up your cells. And here you are, a collection of around 75 trillion specialized cells, organized in such a way as to make up you.
Image credit: J. Roche at Ohio University.
But at your core, you are still just…
esiegel | February 25, 2013"Let the great world spin for ever down the ringing grooves of change." -Alfred Lord Tennyson
Welcome back, for another Messier Monday here on Starts With A Bang! Each Monday, we've been taking a look at one of the 110 Deep-Sky Objects that make up the Messier catalogue, a mix of clusters, nebulae, galaxies and more, all visible from most locations on Earth with even the most basic of astronomical equipment.
Image credit: Greg Scheckler, from his 2008 Messier marathon, where he nabbed 105/110.
When you think of our local group of galaxies, you probably think of the Milky Way and Andromeda…
esiegel | February 8, 2013"Night, when words fade and things come alive. When the destructive analysis of day is done, and all that is truly important becomes whole and sound again." -Antoine de Saint-Exupery
When you look out into the Universe, what is it that you typically think of? Do you think of reliable, fixed stars and constellations? The vast expanse of the Milky Way, with its memorable dust lanes and amorphous shapes?
Image credit: Wally Pacholka of http://www.astropics.com/.
The unchanging nature of the points of light in the sky?
Image credit: Roth Ritter (Dark Atmospheres), of the double cluster in…
esiegel | February 4, 2013"The thing's hollow—it goes on forever—and—oh my God—it's full of stars!" -Dave Bowman, 2001: A Space Odyssey
Back in October, we began a new, weekly series here called Messier Monday. Each Monday, we've taken a look at one of the 110 deep-sky objects that make up the Messier Catalogue, nebulous objects that might potentially be confused with comets by unaware comet-hunters.
Image credit: Lee Kelvin and Grant Miller, via http://star-www.st-and.ac.uk/~lsk9/.
These objects include stellar remnants, star-forming nebulae, young star clusters, ancient globular clusters, and distant galaxies far…
esiegel | February 1, 2013“It surprises me how disinterested we are today about things like physics, space, the universe and philosophy of our existence, our purpose, our final destination. It’s a crazy world out there. Be curious.” -Stephen Hawking
One of the most existential questions humanity has ever asked is the question of our origins: where do I come from? Inspired by Ben Kilminster's writings, here's the entire history of the Universe -- that's led up to the existence of you -- in just 10 sentences*.
Image credit: Amber Stuver of http://www.livingligo.org/.
1.) At some point in the distant past**, the…
esiegel | January 23, 2013“Hell must be isothermal; for otherwise the resident engineers and physical chemists (of which there must be some) could set up a heat engine to run a refrigerator to cool off a portion of their surroundings to any desired temperature.” -Henry Albert Ben
One of the most amazing ideas to come out of our observations of the Universe over the last century is that our vast, star-filled, mostly-empty Universe hasn't always been like this.
Image credit: Ricky Barnard / Fine Art America.
Today, the Universe is very cold, expanding, and the average distance between galaxies is increasing as time…
esiegel | January 21, 2013"Modern man must descend the spiral of his own absurdity to the lowest point; only then can he look beyond it." -Vaclav Havel
But the spiral is more than a metaphor or a mathematical shape, it's also the most common feature observed in the galaxies out there in the Universe. There are 27 spiral galaxies in the Messier Catalogue, and today I want to show you how to find the most southerly of them all!
Image credit: Rich Richins, of all 110 Messier objects (in no particular order). M83 boxed.
The Southern Pinwheel Galaxy, also known as Messier 83, is a full 30 degrees south of the celestial…
esiegel | January 11, 2013"Every man has a right to utter what he thinks truth, and every other man has a right to knock him down for it." - Samuel Johnson
I have a six-sided die. I'm going to roll it ten times, and record each roll. And when I'm done, I'm going to have an incredibly rare, bet-you-can't-reproduce-it result!
Image credit: random.org's dice roller.
Look at that! Ten rolls of a six-sided die, and I got: 3, 2, 3, 5, 5, 5, 4, 1, 4, and 3! What a glorious, odds-defying sequence of events!
In fact, if you took a fair six-sided die and rolled it ten times, you'd have less than a 1-in-60,000,000 chance of…
esiegel | January 5, 2013"Stuff your eyes with wonder, live as if you'd drop dead in ten seconds. See the world. It's more fantastic than any dream made or paid for in factories." -Ray Bradbury
It wasn't all that long ago -- back when I was a boy -- that the only planets we knew of were the ones in our own Solar System. The rocky planets, our four gas giants, and the moons, asteroids, comets, and kuiper belt objects (which was only Pluto and Charon at the time) were all that we knew of.
Image credit: NASA's Solar System Exploration, http://solarsystem.nasa.gov/planets/index.cfm.
But these were just the worlds…