Thursday, February 18, 2010
Missing Arizona Skies
Saturday, August 15, 2009
Variability in Type 1A Supernovae Has Implications for Studying Dark Energy
The discovery of dark energy, a mysterious force that is accelerating the expansion of the universe, was based on observations of type 1a supernovae, and these stellar explosions have long been used as "standard candles" for measuring the expansion. But not all type 1A supernovae are created equal. A new study reveals sources of variability in these supernovae, and to accurately probe the nature of dark energy and determine if it is constant or variable over time, scientists will have to find a way to measure cosmic distances with much greater precision than they have in the past.
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Sunday, August 9, 2009
Living in San Antonio = Terrible night sky conditions :(
Wednesday, September 10, 2008
Been a Long Time
Saturday, November 3, 2007
New H-Alpha Filter Meets the Rosette Nebula
Thursday, October 25, 2007
Flame and Horsehead Nebulae Once More
Saturday, October 13, 2007
Treasures in the Alnitak Stellar Region
No doubt about it the Orion complex contains many glorious treasures for the CCD chip to capture. An example of this is the very bright star Alnitak (Zeta Orionis, the eastern-most star in Orion's belt.) This area is host to both NGC 2024 aka the Flame nebula and Barnard 33 aka the Horsehead nebula both you will see are named for obvious reasons. My image was taken using a UHC/UPR filter to strip away unwanted skyglow and enhance the delicate filements of dust and gas. The remarkable Horsehead is a dark globule of dust and non-luminous gas, obscuring the light coming from behind, especially the moderately bright nebula IC 434.
Friday, October 12, 2007
Monday, October 8, 2007
Well here is my first usable shot of m27 aka the Dumbbell nebula. The Dumbbell is a remnant of a sun like star that in its death throes shed its outer surface and sent it flying out into space leaving behind a beautiful display of color and structure. M27 is thought to be the first planetary nebula discovered. This jewel in the scope for a change actually looks like its nickname. It is quite bright and can even be viewed telescopically from a light polluted area. Until next time --Clear Skies
Wednesday, September 19, 2007
M42 Night Two a Little More Light
Tuesday, September 18, 2007
Return of the Orion Nebula (M42)
Well I hate to quote the former Disney darling Britney Spears but... "Oops I did it again..." I had to go and do it imaging an object that is a bit out of season. The hours I work afford me the ability to shoot objects that are better left alone until the winter months in the northern hemisphere. But at any rate here she is the Great Orion nebula and the Running Man nebula off to the left along for the ride. Here is the lowdown straight from Wikipedia. M42 is a diffuse nebula situated south of Orion's Belt. It is one of the brightest nebulae, and is visible to the naked eye in the night sky. M42 is located at a distance of about 1,500 light years away, and is the closest region of star formation to Earth. The M42 nebula is estimated to be 30 light years across.
For this image I collected a mere twenty minutes of data so I am hoping to produce a more detailed image in the days to come using as much as an hours worth of data to tease out more or the gossamer wisps of hydrogen field of view.
Thursday, September 13, 2007
Seeing in the Dark
Wednesday, September 12, 2007
M33 The Triangulum Galaxy more or less done
Well after three laborious nights I am ready to post the sum of my work on the Triangulum galaxy cataloged by Charles Messier as M33. This face on spiral weighs in at around magnitude 5.7 (mag) but since it is face on it is much more difficult to view with the eye in the scope unless you are under dark skies. The camera however has no real problem. The data collected for this image is around 1hour 20 min.
Monday, September 10, 2007
M45 aka the Pleiades (The Seven Sisters)
The stars in the Pleiades are thought to have formed together around 100 million years ago, making them 1/50th the age of our sun, and they lie some 130 parsecs (425 light years) away. From our perspective they appear in the constellation of Taurus, with approximate celestial coordinates of 3 hours 47 minutes right ascension and +24 degrees declination.
I also took my first crack at a portion of the Veil nebula in the constellation Cygnus the swan. The Veil nebula is a supernova remnant that occurred about 5 - 10,000 years ago. It is located around 1,400 light years away.
Wednesday, September 5, 2007
Pale Blue Dot
One of the most beautiful and inspiring chunks of literature putting our cosmic place into perspective.
This excerpt from A Pale Blue Dot was inspired by an image taken, at Sagan's suggestion, by Voyager 1 on February 14, 1990. As the spacecraft left our planetary neighborhood for the fringes of the solar system, engineers turned it around for one last look at its home planet. Voyager 1 was about 6.4 billion kilometers (4 billion miles) away, and approximately 32 degrees above the ecliptic plane, when it captured this portrait of our world. Caught in the center of scattered light rays (a result of taking the picture so close to the Sun), Earth appears as a tiny point of light, a crescent only 0.12 pixel in size.
Look again at that dot. That's here. That's home. That's us. On it everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor and explorer, every teacher of morals, every corrupt politician, every "superstar," every "supreme leader," every saint and sinner in the history of our species lived there--on a mote of dust suspended in a sunbeam.
The Earth is a very small stage in a vast cosmic arena. Think of the rivers of blood spilled by all those generals and emperors so that, in glory and triumph, they could become the momentary masters of a fraction of a dot. Think of the endless cruelties visited by the inhabitants of one corner of this pixel on the scarcely distinguishable inhabitants of some other corner, how frequent their misunderstandings, how eager they are to kill one another, how fervent their hatreds.
Our posturings, our imagined self-importance, the delusion that we have some privileged position in the Universe, are challenged by this point of pale light. Our planet is a lonely speck in the great enveloping cosmic dark. In our obscurity, in all this vastness, there is no hint that help will come from elsewhere to save us from ourselves.
The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand.
It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we've ever known.
-- Carl Sagan, Pale Blue Dot, 1994
Tuesday, September 4, 2007
Lunar Eclipse August 28 2007
Monday, September 3, 2007
Picture of the lunar eclipse taken the morning of Aug. 28 2007 At this point in the image the eclipse was just short of totality. Eclipses of this sort are truely a wonder to behold, even with the naked eye. Especially with the naked eye. I am working on a slideshow of the eclipse that I will post as soon as I get around to putting it together.