These pages chronicle the work and ruminations of Carolyn Collins Petersen, also known as TheSpacewriter.
I am CEO of Loch Ness Productions. I am also a producer for Astrocast.TV, an online magazine about astronomy and space science.
For the past few years, I've also been a voice actor, appearing in a variety of productions. You can see and hear samples of my work by clicking on the "Voice-Overs, Videos and 'Casts tab.
My blog, TheSpacewriter's Ramblings, is about astronomy, space science, and other sciences.
Ideas and opinions expressed here do not represent those of my employer or of any other organization to which I am affiliated. They're mine.
Visit my main site at: TheSpacewriter.com.
**I encourage comments and discussion; please keep it polite and respectful. I do moderate them to weed out spam, but I also refuse to post any messages that contain harassing, demeaning, rude, or profane language. I run a respectable establishment here.
Contact me for writing and voice-over projects at: cc(dot)petersen(at)gmail(dot)com
I Twitter as Spacewriter
Blog entry posting times are U.S. Mountain Time (GMT-6:00) All postings Copyright 2003-2011 C.C. Petersen
Spacewriter’s Recent Posts
- Writing about Astronomy
- The End of the Kepler Mission?
- Using the Sky
- A Little Solar Activity
- All Hail Albertus Alauda
- Hubble Spots Comet ISON
- The Once and Future Universe
- ► 2013 (34)
- ► 2012 (78)
- ► 2011 (107)
- ► 2010 (95)
- ► 2009 (225)
- ► 2008 (291)
- ► 2007 (114)
- ► 2006 (72)
- ► 2005 (56)
- ► 2004 (96)
- ► 2003 (74)
- ► 2002 (21)
|« Feb||May »|
Like space music?
Check out my favorite
space music artist:
- 21st Century Waves - Technology Booms and Human Expansion Into the Cosmos
- About.Com Space/Astronomy
- Adot’s NotBlog
- Astronomy Blog
- Astronomy Cast
- BLooloop: CCP
- Captain Disillusion
- ChandraBlog - Chandra X-ray Telescope
- Cosmic Log
- Cosmic Mirror
- Cosmic Variance
- Discovery Space
- DP’s Astronomy Blog
- European Southern Observatory
- Friends of the Griffith Observatory
- Gemini Observatory
- Griffith Observatory
- Hairy Museum of Natural History
- Hubble Space Telescope
- Kids Directory
- Loch Ness Productions - Cosmic content
- Loch Ness Productions on Facebook - the world’s foremost fulldome video producer for planetarium shows
- Mike Brown’s Planets
- MIT/Haystack Observatory
- MWA Vodcast
- NASA Climate Change
- National Public Radio
- Observing the Sky
- One Astronomer’s Noise
- Prince of Pithy
- Science Made Cool
- Significant Snail
- Solar System Watch
- Space Times News
- Space Weather FX Vodcasts
- Star Stryder
- Stop Unethical Recission
- String Theory
- The Daily Galaxy
- The Mathroom (possibly NSFW)
- The Meridiani Journal
- The Planetary Society Blog
- The Way Things Break
- Understanding Science
- Universe Today
April 28, 2004 at 22:36 pm | Leave a Comment
As astronomers gaze across the deeps of space and time, they run across scenes like this one — where two (or more) galaxies just get too close to each other for comfort. When this happens, sometimes galaxies end up colliding.
The European Southern Observatory’s Very Large Telescope caught a glimpse of a cosmic tango taking place 190 million light-years away in the direction of the southern hemisphere constellation Pavo, the Peacock. And, like Hubble’s spectacular image of a ring galaxy (created by yet another collision), this VLT image was taken to celebrate another telescopic anniversary — the VLT’s fifth birthday.
So what’s happening in this scene?
NGC 6769 (the one on the upper right) is a spiral galaxy with very tightly wound spiral arms. Its neighbor (NGC 6770) has two major spiral arms. One looks rather straight and points towards the outer disc of NGC 6769. NGC 6770 is also peculiar because it shows two comparatively straight dark lanes and a fainter arc that curves towards the third galaxy toward the bottom of the image, called NGC 6771 (below). Stars and gas have been stripped off of both NGC 6769 and NGC 6770, and they’re starting to form a common envelope around them. Some folks have suggested it looks like the shape of a Devil’s Mask. There might also be a tenuous bridge between NGC 6769 and NGC 6771. All of these features are there because there’s strong gravitational interaction between the three galaxies.
Well, you might think that such a collision would destroy the galaxies and any chances for the normal things that galaxies do (like host star-forming regions).
There is a true baby-star boom going on in this scene. A cosmic catastrophe like this one normally results in the formation of many new stars, which you can see in the blueish clouds that highlight the spiral arms in NGC 6769 and NGC 6770. There are many sites of star-forming regions.
VLT, and other telescopes (including HST) are studying a great many cosmic collisions like this one to help scientists figure out how and why galaxies form, evolve, and change over time. There’ll no doubt be more cool pix like this one in the years to come!
April 27, 2004 at 12:47 pm | Leave a Comment
If you’ve always wanted to spot a comet with your very own eyes, there are a couple of them inbound that you should be able to see in the next few weeks. They’re called Comet LINEAR and Comet NEAT. Right now, Comet LINEAR is hard find to in the bright glow of dawn just above the eastern horizon before sunrise, and Comet NEAT is visible only from the Southern Hemisphere. But that will soon change.
For now, in the final week of April and the first few days of May, North American and European skywatchers do have a shot at spotting Comet LINEAR before dawn on clear mornings. Look with binoculars just above the horizon due east about 60 minutes before your local time of sunrise.
Later on in the month, both LINEAR and NEAT will come into in the evening sky. Starting around May 5th or 6th, scan for Comet NEAT just above the southwest horizon as evening twilight fades. Look for a small, fuzzy “star” with a small tail pointing to the upper left. (The much brighter star Sirius will also be low in the southwest; on May 5th the comet will be not far to its left, and on May 6th the comet will be to Sirius’s upper left.) In the next two weeks Comet NEAT will get much higher in the southwest at nightfall, though it will also fade. Binocular users may be able to follow it through the end of May.
Around May 26th or 28th, Comet LINEAR could steal the show when it too enters the evening sky. Look for it just above the west-southwest horizon as twilight fades. It will get only a little higher in the following week or two, while fading rapidly.
Full details, including charts showing when and where to look for both comets (from the Southern Hemisphere too!) appear in the May 2004 issue of SKY & TELESCOPE and in the article “The Double Comet Show of 2004,” online at SkyandTelescope.com.
Thanks to Alan MacRobert at Sky & Telescope for this information!
April 26, 2004 at 22:50 pm | Leave a Comment
You gotta love the Hubble Space Telescope. There it is up there, looking out across the deeps of space and time, spotting shreds of galaxies as they formed some 300,000 to 500,000 years after the Big Bang, and then it turns around and gives us a view of a little shard of a world called Sedna. This place, smaller than the Moon, smaller than Pluto, lies about 90 times the distance between the Earth and Sun, out in a region of the solar system called the Kuiper Belt. It’s a leftover bit of ice (mostly) from the formation of the solar system some 5.5 billion years ago. It’s so dim and small that HST’s image is one pixel across. But, it’s an informative pixel!
For instance, it tells us that (so far) HST hasn’t spotted a companion to this planetoid, although the astronomer who discovered it on March 15, 2004, calculated its spin rate (it’s “day”) and determined that it should have a moon of some kind. The fact that it doesn’t illustrates one of those wonderful “non-results” that tells us valuable information. Science is replete with stuff like this — what looks like a non-result actually helps us put limits on an object’s actions or size or mass or other characteristic. It reminds me of the observation run I did in Hawaii where we studied Comet Hale-Bopp in late 1996. We thought we might be able to spot a plasma tail forming earlier than might be expected. However, when we examined the data, we found no evidence of the plasma tail, which told us that even with a comet of that size, it had to be close enough to the Sun (essentially within about 2 to 2.5 AU of the Sun) before its plasma tail would form. It helped us nail down parts of a descriptive theory we were formulating about how and when and why these glowing tails form when they do as a comet approaches the Sun during its orbit.
Astronomers will keep studying Sedna, and in fact, they have looked at it with other telescopes since its discovery. Expect to see a few more announcements about this frigid world at the frontiers of the solar system!
Older entries »
This blog a wholly pwnd subsidiary of Carolyn Collins Petersen, a.k.a. TheSpacewriter.
Copyright 2013, Carolyn Collins Petersen
Image of Horsehead Nebula: T.A.Rector (NOAO/AURA/NSF) and Hubble Heritage Team (STScI/AURA/NASA)
“It is by Coffee alone I set my day in motion. It is by the juice of bean that coffee acquires depth, the tongue acquires taste, the taste awakens the body. It is by Coffee alone I set my day in motion.”
Spam prevention powered by Akismet