1. Life in the Universe I. astronomy Páll Jakobsson (pja@hi.is) 8 January 2013 “Somewhere, something incredible is waiting to be known.” Carl Sagan (1934-1996)

2. The Exoplanet Next Door

4. Tau Ceti: A quintet of Exoplanets 2-6 times Earth masses

5. 14

6. eXtreme Deep Field (XDF) An exposure time of 2 million seconds! 5,500 galaxies A small fraction of the angular diameter of the full Moon

7. Hubble XDF (zoom-in)

8. Hubble XDF (zoom-out)

9. Looking Back into Time with the XDF

10. Known Exoplanets 1992: a few are discovered around a neutron star! 1995: the first around Sun-like star (indirect measurement). January 2013: 854 (http://exoplanet.eu): 1)Radial velocity + astrometry: 498 (386 planetary systems) 2)Transits: 291 (236 planetary systems) 3)Microlensing: 16 (15 planetary systems) 4)Imaging: 32 (28 planetary systems) 1), 2) and 3) are indirect measurements.

11. White dwarves and neutron stars