Disks around selected young stars seen by the Hubble Space Telescope
Disks around selected young stars seen by the Hubble Space Telescope
Disks around selected young stars seen by the Hubble Space Telescope
Disks around young stars in the Orion Nebula
Disks around selected young stars seen by the Hubble Space Telescope
Dust disk around Vega seen at submillimeter wavelengths
Observing a pulsar with planets at the Arecibo radio telescope in Puerto Rico
The planetary system around the pulsar PSR B1257+12 compared to our Solar System
Doppler shifts due to stellar wobble induced by an orbiting planet
The orbital path of the Sun caused by the gravitational tugs of its planets (mainly Jupiter and Saturn)
The star 51 Pegasi
The radial velocity variations of 51 Pegasi versus time
The radial velocity variations of 51 Pegasi versus orbital phase
A comparison of the 51 Pegasi system to our inner Solar System
An artist's impression of the 51 Pegasi planet - A "hot Jupiter" and a "roasting beast"
Upsilon Andromedae - A star with multiple planets
Comparison of the Upsilon Andromedae system with our inner Solar System
An artist's impression of an extrasolar planet transiting its parent star
Light curve showing a transit of HD209458 by its planet
Probing the atmosphere of a transiting planet with absorption lines
A selection of extrasolar planets (more than 100 are now known)
Mass distribution of known extrasolar planets
Comparison of different planet detection techniques
Schematic diagram of the Kepler mission - Will study transits of Earth-like planets - Launches in 2006
Artist's impression of the Terrestrial Planet Finder mission - Will make images and spectra of extrasolar planets
Spectra of Venus, Earth, and Mars - Note that water is only seen in the Earth's spectrum
The "habitable zone" where liquid water can exist for different types of stars
The importance of keeping an open mind when thinking about the "habitable zone"
ALH84001 - A 4.5 billion year old martian meteorite found in Antarctica
Magnified view of part of ALH84001 - Note the rod-shaped structures that have been greatly debated
The Drake equation with some guesses at appropriate numerical values
The Arecibo radio telescope in Puerto Rico - One of the telescopes used in the Search for Extraterrestrial Intelligence (SETI)
The terrestrial microwave window
SETI at home - Search for extraterrestrial life with your home computer
The Fermi Paradox - If extraterrestrial life is common, why haven't we been colonized already?
A Dyson sphere - A way for an advanced civilization to capture all the energy flowing out from a star
The "real" evidence for extraterrestrial life - Just joking!
The "real" evidence for extraterrestrial life - Just joking!
