Post on 12-Jul-2015
Pete Worden Center Director, Ames Research Center
Natalie Batalha Kepler Deputy Science Team Lead, San Jose State University
What fraction of stars in our galaxy harbor potentially habitable, Earth-size planets?
Planet Candidates as of June 2010
Orbital Period in days
Siz
e R
elat
ive
to E
arth
Jun 2010
Planet Candidates as of Feb 2011
Orbital Period in days
Siz
e R
elat
ive
to E
arth
Jun 2010 Feb 2011
Planet Candidates as of Dec 2011
Orbital Period in days
Siz
e R
elat
ive
to E
arth
Jun 2010 Feb 2011 Dec 2011
Sizes of Planet Candidates
207
680
1181
203 27 (+204%)
(+136%)
(+78%)
(+23%)
(+42%)
Earth-size −
Super Earth-size −
− Neptune-size
− Jupiter-size − Super Jupiter-size
Candidates in the Habitable Zone
Equilibrium Temperature [K]
Siz
e R
elat
ive
to E
arth
Jun 2010 Feb 2011 Dec 2011
223K - 373K
Dec: 139
Feb: 54
Equilibrium Temperature [K]
Siz
e R
elat
ive
to E
arth
Jun 2010 Feb 2011 Dec 2011
185K - 303K
Dec: 48
Feb: 25
Candidates in the Habitable Zone
Equilibrium Temperature [K]
Siz
e R
elat
ive
to E
arth
Jun 2010 Feb 2011 Dec 2011
Ten Near-Earth-Size Candidates in the Habitable Zone (185-303 K)
Equilibrium Temperature [K]
Siz
e R
elat
ive
to E
arth
Jun 2010 Feb 2011 Dec 2011
Ten Near-Earth-Size Candidates in the Habitable Zone (185-303 K)
William Borucki Kepler Principal Investigator at Ames
Data Confirmation
Data Confirmation
Composition Dependence on the Radius and Mass of a Planet
First Confirmed Kepler Planet In the Habitable Zone
When Is an Earth-Analog"Really an Earth-Analog?
Jill Tarter, Director, Center for SETI Research
The Allen Telescope Array
ATA-42
Shasta
Lassen
Allen Telescope Array
Hat Creek Radio Observatory
3He+
NO
ISE
ME
AS
UR
ED
IN
DE
GR
EE
S K
ELV
IN
FREQUENCY IN GHz
Hydrogen 3Helium+
f0 = 1420 MHz λ0 = 21 cm
f0 = 8666 MHz λ0 = 3.46 cm
Hyperfine Spin-Flip Transition
Voyager 1 Signal from 106 AU Away
Frequency
Tim
e
Last Month Looking at Mars
Frequency
Tim
e
MRO
Mars Express