Submitted by Anonymous (not verified) on Fri, 1997-01-03 08:00
Submitted by Jim Early, Orange County, and answered by Dr. Roger Blandford, Richard Chace Tolman Professor of Theoretical Astrophysics and Executive Officer for Astronomy; and David Hogg, Caltech graduate student in physics.
A similar question was asked by Shawn McCord, age 8, of Covina.
Submitted by Anonymous (not verified) on Fri, 1996-12-27 08:00
Question of the Month Submitted by Rick Conner, Laguna Niguel, and answered by Donald Burnett, Professor of Geochemistry, Caltech.
The answer is yes.
Elements are numbered according to the number of protons they contain. For example, hydrogen, the first element on the periodic table, has one proton. Oxygen has eight, iron has 26, and gold has 79. Uranium, with 92 protons, is the heaviest element that has been detected elsewhere in the universe by astronomers.
Submitted by Anonymous (not verified) on Thu, 1996-12-19 08:00
Submitted by Ann Marchillo, Glendora, Calif., and answered by Matt Fraser and Patrick Chuang, graduate students in environmental engineering at Caltech.
Ozone is a molecule containing three atoms of oxygen, and is known by the chemical symbol "O3." The stuff we breathe is "O2," which contains two atoms of oxygen. The "ozone hole" is a decrease in the amount of ultraviolet-absorbing ozone in the upper part of the earth's stratosphere, about 10 miles above ground level.
Submitted by Anonymous (not verified) on Sun, 1996-12-15 08:00
SAN FRANCISCO—In two closely related presentations today at the annual American Geophysical Union conference, Caltech geophysicist Don Anderson will describe work suggesting a radical new interpretation of how Earth operates inside. The work is based on recently declassified satellite imagery as well as a revisiting of the issue of primordial helium (the 3He isotope) within Earth.
Submitted by Anonymous (not verified) on Thu, 1996-12-12 08:00
Submitted by Dean Bessette, Huntington Beach, Calif., and answered by Dave Stevenson, George Van Osdol Professor of Planetary Science, California Institute of Technology
As everyone with a refrigerator knows, ice cubes tend to shrink over time. And if you have an old-style refrigerator, you may have observed that the ice molecules go directly from the ice cubes to the walls of the freezer compartment without ever becoming liquid water. This is the process of sublimation, and your question about its relevance to the water found on the moon is a good one.
Submitted by Anonymous (not verified) on Wed, 1996-11-13 08:00
PASADENA— New research from the California Institute of Technology shows that it literally takes some time to smell the roses.
In the current issue of Nature, Caltech neuroscientists Michael Wehr and Gilles Laurent present work demonstrating that information about odors is contained in the temporal activity patterns of groups of neurons over an interval of time.
Submitted by Anonymous (not verified) on Sat, 1996-10-26 07:00
Tucson, Arizona — When Galileo discovered Ganymede four centuries ago, little did he suspect that the third satellite from Jupiter might be glazed over with the very substance he was breathing.
It took modern astronomical instruments and chemical knowledge for scientists to detect the oxygen and ozone that coat Ganymede. Now, two planetary scientists affiliated with the California Institute of Technology have developed a theory to account for the presence of the substances, as well as the mechanism by which their concentrations are maintained.