October 20 2004 - Extrasolar Visions gains an updated interface!

In preparation for the new "Grand Tour" section, I've been busy working on new layouts for the main Planet and Star description pages. You'll notice several new features. First of all, stars and planets have very similar layouts, with descriptions on the left and data tables on the right. The top of the description sections have a star system layout. Each planet or star is clickable, so you can now navigate quickly between objects in a single star system. If you check out gamma Cephei or PSR B1620-26, you'll notice that these systems now include stellar companions as well as the system primaries and the known planets. I'll soon be adding stellar companions for other systems, as well as updating the VRML to reflect close binary systems.

I've now added radius and effective temperature values for most of the stars, allowing me to calculate approximate planet temperatures. I've been doing quite a bit of research into how temperature affects what composition of clouds can exist in a jovian atmosphere. The result of that research is that the planet description pages, using the new temperature data, will now infer the likely appearance of a planet based on what kinds of clouds can persist under those conditions, as well as the extent of the host star's habitable zone and whether or not the planet orbits within that zone. These calculations work for the planets of our own solar system, even down to properly predicting the cloud compositions of each.

Much of the artwork on the site is out of date, especially in light of the new temperature calculations. There are some cases where planets previously listed as epistellar "Hot-Jupiters" turn out to be rather cool due to the small size of their stellar parents. In other cases, hotter suns make for hotter planets than I had previously described. In coming months I will be creating new artwork and shifting old images to planets that are more appropriate. I'll also be going system by system adding comments and speculations as well as more pictures from NASA and other agencies. The object type descriptions, such as "Epistellar Giant" or "Near Epistellar Giant" will also be updated to reflect temperature rather than distance, giving a more accurate sense for what the planet behind the label is like. The VRML will also be updated.

Finally, I've added a polling system so I can get a better sense of what readers of Extrasolar Visions are interested in. So far, it seems you're interested in "Super Earths." Not to worry, they are coming.

- John T. M. Whatmough