Showing posts with label APOD. Show all posts
Showing posts with label APOD. Show all posts

Friday, September 2, 2016

Soponyai's "A Day in the Astro Camp"


"A Day in the Astro Camp" is a composite photograph taken by György Soponyai. This image is a composite of images taken over 33 hours and planned for over 2 years. This 360x180 photo appears to show a tiny planet, with a field and trees on its day side and the red streamers and lights of the local inhabitants partying on its night side. The image was taken at the annual Astro Camp of the Hungarian Astronomical Association, so those inhabitants are probably some space nerds in their own right. The little world presented in this image almost seems to be lofted over a sea of star trails. The arc of the orbit of the International Space Station adds the little off-set arc below the globe. You can find more info about this image at Soponyai's Flickr as well as on the Astronomy Picture of the Day.

Wednesday, August 3, 2016

Cosmic Traveler: Photo by A. Garret Evans


Today's APOD is this beautiful composite image of the Milky Way, Saturn, and some of our closest stellar neighbors over a stargazer's head in Maine. Some detail has been added to show where constellations and Saturn are at. Just looking at this picture makes me want to get out and go stargazing as soon as I possibly can. The heavens above have so much to offer, for sights and for thoughts.

Here's some info on the picture from APOD: 

"What if you climbed up on a rock and discovered the Universe? You can. Although others have noted much of it before, you can locate for yourself stars, planets, and even the plane of our Milky Way Galaxy. All you need is a dark clear sky -- the rock is optional. If you have a camera, you can further image faint nebulas, galaxies, and long filaments of interstellar dust. If you can process digital images, you can bring out faint features, highlight specific colors, and merge foreground and background images. In fact, an industrious astrophotographer has done all of these to create the presented picture. All of the component images were taken early last month on the same night within a few meters of each other. The picturesque setting was Sand Beach in Stonington, Maine, USA with the camera pointed south over Penobscot Bay."

Friday, July 15, 2016

Crabby, Crab, Crabby, Crab, Crab.

There's a neutron star in the middle of the Crab Nebula, and that sucker is spinning 30 times every second!

Image Credit: NASA, ESA, J. Hester (ASU), and M. Weisskopf (NASA / MSFC)
The above image was released on Astronomy Picture of the Day recently. It shows the illumination of the Crab Nebula from the Crab Pulsar (the rightmost of the two bright stars in the image). A pulsar is a neutron star which is highly magnetized and spins rather quickly, emitting radiation. The Crab Nebula itself is made up of the remnants of a large star that collapsed long ago, blowing off lots of material and forming the Crab Pulsar neutron star. The spinning of the pulsar drives the illumination of the nebula. 

The image of the Crab Nebula above comes from a composite of x-ray and optical light data from the Chandra X-ray Observatory and the Hubble Space Telescope. The video below shows the two different types of image (x-ray in blue, optical in red) in seven different sets of images from November 200 to April 2001. Those images have been looped many times to create a video, where you can see the swirling stellar winds moving through the nebula from the pulsar.




The Crab Nebula is beautiful, but that beauty can find new meaning when we consider the processes that formed the nebula and are affecting it today.

Here's a wider image showing the Crab Nebula in all of its glory. Let this one sink in...

Crab Nebula (NASA)

Sunday, June 19, 2016

Depths of Time in a Starry Night Image

Image Credit: Brad Goldpaint
The APOD today is beautiful! The above image, taken by Brad Goldpaint, shows a starry night scene over the Ancient Bristlecone Pine Forest in California, U.S.A. 

The trees in the image are themselves quite old, dating back several thousands of years, with one tree named Methuselah dated to 4,847 years old and another tree (not yet named) dating back to 5,065 years in age (these trees are considered to be the oldest known living non-clonal organisms). Some of those bristlecone pines stood long before Galileo turned his telescopes to the heavens; those trees bathed in starlight generations before Eratosthenes of Cyrene calculated the circumference of the Earth and developed a science of chronology; and some of those trees opened their branches to the world before people started laying the stones that would become the Great Pyramid of Egypt.

Goldpaint's night scene also shows the planets Saturn and Mars, of which the curators of APOD remark are "seemingly attached to tree branches, but actually much farther in the distance... These planets formed along with the Earth and the early Solar System much earlier -- about 4.5 billion years ago." In my recent talk, "This Thing is Older Than Your Mom" (which I gave for the 3rd Season finale of Famelab USA), I spoke of the oldest solid materials to have formed in our solar system. The calcium-aluminum-rich inclusions (CAIs) and chondrules that can be found in some of the most primitive meteorites are materials that formed before the planets as we know them. Those materials and others in primitive meteorites have given us insight into the earliest processes in our solar system, including the timing of the formation of our planets. That's how we can say that Saturn and Mars are over 4.5 billion years in age. The lives of the bristlecone pines would seem just a short blink of time relative to the ages of Saturn, Mars, the Earth, and our solar system. 

However, the oldest of the old, the most ancient of the ancient and venerated of the venerable, in this beautiful image are the stars stippling the night's sky and the band of white of our Milky Way Galaxy. At best, a single person may be able to see 2000 or so stars at night, yet we can see the illumination of our sky in a milky white band due to the illumination from hundreds of thousands of millions of other stars in our galaxy (most shining from somewhere near the plane of the galaxy). Some of those stars may be much younger than our own Sun and planets, while most of them are quite older. Sadly, a recent report in Science Advances estimates that at least 80% of the world's population lives under light polluted skies, so that as much as one third of the global human population can no longer see the Milky Way at night (we are truly stealing our history from our children by taking away the night's sky). While we should take a moment of pause and reflection at the fact that most people cannot observe the Milky Way, at least we can look on images like Goldpaint's picture at the top of this post and consider the depths of time that have passed on our planet, in our Solar System, and in the Milky Way Galaxy that surrounds us. 


Thursday, June 16, 2016

Winners from the 2016 International Earth & Sky Photo Contest


Popping open Astronomy Picture of the Day on my laptop this morning revealed a fantastic image of the night's sky over Reine, Norway, with the yellowed lights of an island village tucked beneath glacially carved landforms while the night's sky above swirls, alight with the green ghostly glowing of the Aurora Borealis:


The photo, taken by Alex Conu, was the 1st prize winner in the 2016 International Earth & Sky Photo Contest. The theme for this year's contest was "Dark Skies Importance" and the photos were judged in many criteria under two main categories, showing the viewers of the images the beauty and glory of the night's sky, and also showing how terrible the light pollution problem has become (you may have heard of the recent study showing that at least 80% of all humans live under skies affected by light pollution).

If, like me, you love to see fantastically beautiful images of the night's sky, then definitely check out this video showing off several of the best photos from this year's contest:



Thursday, March 3, 2016

Our Moon and the Galilean Moons

The Astronomy Picture of the Day (APOD) today is too darned good not to share. It's an image (credit: Phillip A Cruden) of our Moon along with more distant points of light from the Galilean Moons and Jupiter. Here's the image along with the text from APOD:


"Some of the Solar System's largest moons rose together on February 23. On that night, a twilight pairing of a waning gibbous Moon and Jupiter was captured in this sharp telescopic field of view. The composite of short and long exposures reveals the familiar face of our fair planet's own large natural satellite, along with a line up of the ruling gas giant's four Galilean moons. Left to right, the tiny pinpricks of light are Callisto, Io, Ganymede, [Jupiter], and Europa. Closer and brighter, our own natural satellite appears to loom large. But Callisto, Io, and Ganymede are actually larger than Earth's Moon, while water world Europa is only slightly smaller. In fact, of the Solar System's six largest planetary satellites, only Saturn's moon Titan is missing from the scene."

Sunday, November 22, 2015

Phobos on My Phone


This pic of the Martian moon Phobos is rockin' on the background of my phone today. I recently downloaded the NASA App, which allows you to set up your phone to display a new picture very day from Astronomy Picture of the Day (APOD). The app also let's you download cool ringtones and notification sound-clips that are made of up of sounds from space (rockets launching, the sounds of the planets, and sonified transit data from Kepler light curves). Definitely get this app on your phone. Then you will also be able to rock sweet images, like this one of little Phobos, every single day.

Friday, July 31, 2015

APOD: The Milky Way Over Uluru


This fantastic image popped up on Astronomy Picture of the Day (APOD) earlier this week. The photo, captured by Babak Tafreshi, shows the disk of our Milky Way Galaxy rising above Uluru (Ayers Rock) in Northern Territory, Australia. Here is the text that was posted along with the image at APOD:

"The central regions of our Milky Way Galaxy rise above Uluru/Ayers Rock in this striking night skyscape. Recorded on July 13, a faint airglow along the horizon shows off central Australia's most recognizable landform in silhouette. Of course the Milky Way's own cosmic dust clouds appear in silhouette too, dark rifts along the galaxy's faint congeries of stars. Above the central bulge, rivers of cosmic dust converge on a bright yellowish supergiant star Antares. Left of Antares, wandering Saturn shines in the night."

APOD is a wonderful site where you can find some of the best astrophotography and astronomy-relevant images on the internet. I check it out every morning. Something about images of Uluru especially draw up thoughts of the mystic and merge beautifully with the background of the heavens at night. For instance, here is another APOD pic of Uluru taken by Vic and Jen Winter. It was posted back in 2002 and shows the annual Leonids Meteor Shower radiating from the heavens around Uluru.


I highly recommend checking out APOD on a regular basis for images like these and far more!