The challenge of learning astrophotography, and photography in general, is two-fold. There’s the work you do at the eyepiece, requiring you to choose the right settings for the right shot. Then there’s the work you do at the computer screen, the post-processing and adjustments. Ultimately the more important one is the camera work. If you take a bad photograph, no amount of post-processing will help you, even if you are an expert at it. It’s like the image is the cake, and the processing is the icing. No matter how much icing you cover it with, a bad cake is...
Remember last week when I was talking about the evidence for some ancient-but-astronomically-recent supernovae? It turns out there is other evidence! Evidence that has helped scientists narrow down the potential source locations. Data from the Cosmic Ray Isotope Spectrometer (CRIS), an instrument aboard NASA’s Advanced Composition Explorer (ACE) spacecraft, has helped us figure out where the recent supernovae might have come from. CRIS measures what we call cosmic rays, atomic nuclei that have been accelerated across the galaxy at close to the speed of light. CRIS has been around for a while, and through 17 years of cosmic ray observations,...
As I’ve said before, the most powerful, most energetic, most intense processes happen in the center. The gravitational center of the Earth, the Sun, and the galaxy are all places where temperature, pressure, and interactions of matter and energy are pushed to their limits. When you look up to the sky it’s easy to see the Milky Way (unless you live in an urban center). Do you ever wonder where the middle of it is? Where that supermassive black hole lies? Astronomers know where it is, but you need infrared cameras to see it past the thick dust that blocks...
I made a big purchase this year, one that I have wanted to make for a long time. I bought a digital single lens reflex camera (DSLR) – A Canon Rebel T3i. The only reason I did this was for astrophotography. I like photography in general – the idea of getting the perfect shot, cleaning up an image, enhancing details that were not there before. But after a trip to Europe where I felt I took too many photos, I decided that I didn’t want to experience my life through the lens of a camera, especially in an age where...
One of the largest and brightest star clusters in the Milky Way galaxy is the Arches cluster, and its easy to see why. Lying only 100 light years away from the supermassive black hole that lies in the heart of our galaxy, it formed in an incredibly dense environment. It lies 25,000 light years from Earth in the constellation Sagittarius, and contains thousands of massive stars, including 160 that are hot, young, and exceptionally more massive than the Sun. Only 1 in 10 Million stars in the galaxy are as bright as these massive central 160 stars. Though it is...
If you’re in Astronomy circles you may have heard about a big cloud of Hydrogen heading toward the supermassive black hole in the centre of our galaxy, Sagittarius A*. The lead up to the cloud approaching the black hole had astronomers buzzing this year, as it would be a direct opportunity for us to see the black hole ‘devour’ the cloud. The black hole would show us some celestial fireworks and give us a huge opportunity to study their behaviour. Astronomers watched closely, and then the cloud passed right by…. We should have seen the cloud torn apart as matter spiralled...
