Category Archives: astronomy

The Not-Quite Circle Dance

Planets go around a star.
Their treks are journeys near and far
The paths are often neatly wound
on loops elliptical instead of round.

What makes these orbits not quite round?
The pull of gravity, it was found,
battles against an object’s need
to cruise through space at constant speed.
So, a planet’s path is a tightrope dance—
a deliberate trip, not happenstance.

Round and round, they go around…
But now we know, they’re
not quite round

© 2007 Carolyn Collins Petersen
This poem about the orbits of planets was inspired by a talk I heard yesterday at Science and Society about how poetry can be inspired by science. The poet, Catherine Hughes, grew up in a family of scientists and found that much of her poetry was infused with themes about science. She made the case that writing about science in poetry can be an interesting, and perhaps even fulfilling, exercise.

So, I decided to give it a try. It’s kind of fun to take a scientific idea and work it into poetry. It doesn’t have to be perfect poetry”that’s not the point. Give it a try.

The Wonderful Beauty of Starbirth Regions and Molecular Clouds

I got sidetracked today on a planetarium show project and didn’t get a chance to blog until late tonight. I got to a stopping point (I’m doing a scratch narration so we can program the show on the dome before we bring in the pro narrator) and decided to resume shuffling through the goodies I brought home from AAS.

A dark cloud in the region of Rho Ophiuchi, a star that lies more than 500 light-years away. Taken by the 2MASS (2-Micron All-Sky Survey) extended mission. A larger image, suitable for your desktop, is available here.
A dark cloud in the region of Rho Ophiuchi, a star that lies more than 500 light-years away. Taken by the 2MASS (2-Micron All-Sky Survey) extended mission. A larger image, suitable for your desktop, is available here.

One of the announcements I picked up at the meeting in Seattle was about an astronomical image mosaic engine called “Montage.” It’s aimed at the professional and high-end amateur astronomer who wants to assemble FITS images into custom mosaics. If that’s your bag, take a gander at the program page. If not, then just feast your eyes on the gorgeous image of the Rho Oph region that someone used Montage to create.

The Rho Ophiuchi nebula is a cloud of dust and gas surrounding a hot, youngish star in the constellation Ophiuchus. The cloud itself has dust lanes interspersed with glowing gases lit by radiation from nearby stars. In some areas, young stars are forming deep within dust cocoons. Astronomers study this region to learn more about the early epochs of star formation, and they also survey its dust and gases to understand just what kinds of stars can form from these clouds. Rho Oph isn’t the only molecular cloud of its kind in our galaxy, but as you can see from the image above, it’s certainly among the loveliest to study.