So, what DOES the Moon mean to you? That’s the question a group of folks interested in lunar exploration are asking as they prepare for International Observe the Moon Night, which is October 8th. The idea is to get folks interested in the Moon, either by observing it or by learning more about the science that astronomers are doing to learn about the Moon. Preferably both! The organizing team consists of scientists, educators, and Moon enthusiasts from all walks of life, the business community, and governments around the world.
So, what’s it take to get involved? Have a moon-gazing event. It can be as simple as gathering in your neighborhood, a gazing session at your planetarium or science center or through your astronomy club. There are already some cool events planned, like moongazing at the Casper Planetarium in Casper, Wyoming, and observing at the South African Astronomical Observatory. You can peruse the current list of activities here.
To get folks in interested in some of the science done on the Moon past, present and future, the Astronomical Society of the Pacific has posted a special episode of their podcast series, Astronomy Behind the Headlines, called “Science From the Moon.” It’s an interview with Dr. Jack Burns of the University of Colorado’s Lunar University Network for Astrophysics Research (LUNAR)—written, conducted and produced by yours truly for ASP (with music from Geodesium)! The podcast was made possible by NASA’s Lunar Science Institute. So, listen in on a great conversation about lunar science, and then get out there and enjoy the Moon!
This HST mosaic image of the Crab Nebula shows a six-light-year-wide expanding remnant of a supernova explosion. Courtesy STScI.
Stardeath produces some of the most intricate-looking objects in astronomy. If you have ever gone to the Hubble Space Telescope’s Web site and searched for planetary nebulae, you know what I mean. Giant stars produce giant explosions, like the long-known Crab Nebula.
The Eskimo Nebula (NGC 2392). The intricate "face" is a bubble of material being blown into space by the central star's intense "wind". Courtesy STScI.
This Hubble Space Telescope image shows us what the supernova remnant is made of (hydrogen gas, particles of heavier elements), and also shows us the structure of the nebula and how it’s influenced by the neutron star at the center. That neutron star is what’s left of the original star — a dense object spinning more than 30 times per second.
Stars like the Sun go a bit less violently, huffing off their atmospheres for millions of years before collapsing to make white dwarfs. The radiation from the central star continues to light up the remains of the former star, creating complicated visions of stellar death. The Eskimo Nebula (right), is a fine example of such a sun-like star’s death. The remains are called a planetary nebula, one of those odd misnomers in astronomy that has nothing to do with a planet, but is a nebula. This sunlike star began to die some 10,000 years ago, blowing bubbles of gas out away from itself and flinging its outer atmosphere to space. Our own Sun might look like this some billions of years from now.
Well, I’ve been long fascinated with the images of star death, ever since I wrote my first book (with Jack Brandt), about Hubble Space Telescope science (called Hubble Vision). A few years ago when I did an update of one of my more-popular planetarium shows, called Hubble Vision 2, I had a great selection of star death images to choose from to tell the story of stellar demise. I wrote about sun-like stars, “Hubble’s images of these stars in their death throes comprise a haunting gallery of destruction.”
As is always the case with my shows, I knew that the soundtrack artist (who also happens to be my husband and co-producer) would find a way to make the scene memorable with his trademark space music and video choreography. The scene in the show is a solemn, beautiful procession of planetary nebula images that bring home to audiences the majesty of a star’s passing.
Fast-forward a few years to this month, and Mark has now released the music from that show soundtrack in an album called Geodesium Stella Novus (where you can preview and buy the album if you’re interested). And, he created a music video based on that planetary nebula scene that really does bring home the majesty of that haunting gallery of destruction we first introduced in the show. We created a fulldome version of the music video, which you might get to see someday at your local digital planetarium.
But, we’ve also got a “flat-screen” version available on our Youtube channel for people to watch and I’ve embedded it below. The piece of music is called “Light Echoes”, and it accompanies these gorgeous views of star death, ranging from supernova remnants to planetary nebula, as cosmic art. It’s not a new concept — the universe as art. But, you have to admit, when you see the way nature has arranged the aftermath of stardeath, it can look evocative, haunting… and artistic!
