A Blog on Exoplanets, Exoplanet Exploration, Astrobiology and Astrophysics. The Mysteries of a Circumstellar Spiral and the London Fog. A few days ago we posted a new paper on arXiv. On the spectacular spiral in the HD 100453 system. The new paper, led by Steward astronomy graduate student Kevin Wagner, settles the question of the origin of the enigmatic spiral arms.

I have moved to the University of California, Riverside. You can find my new web page here. The web site for the Planetary Research Laboratory has moved here.

Goddard Institute for Space Studies. Long-Term Warming Trend Continued in 2017. Our Living Planet Shapes the Search for Life Beyond Earth. Increasing Resiliency to Extreme Weather.

Welcome to the SFSU Exoplanets Group. The Physics and Astronomy Department. At San Francisco State University. Has an active exoplanet research group. Our research involves students at both the undergraduate and graduate level and includes a combination of observational and theoretical programs. Use the links on the left to learn more about our research activities.

Ride Along with New Horizons on its Pluto Flyby. Traveling a relative velocity of nearly 13. And see more renderings and animations by Jónsson on his website here.

Direct Imaging Earth and Moon from Mars. Sometimes images arrive that make it clear that the space age is not a throw-away line, but a reality. This one was taken by a satellite orbiting Mars, and it shows the Earth and the moon. Each was separately processed prior to combining them so that the .