James Green: 3 moons and a planet that could have alien life
James Green - Space physicist
James Green leads NASA's solar system exploration and astrobiology research. Full bio
in our solar system?
very seriously until recently.
for extraordinary claims."
for us to be able to believe it.
those ingredients for life.
to be confident that life,
that early in my career,
that they were beyond Earth
and for any real quantity.
is all frozen.
have changed all that.
to the right places
our life question.
on four locations.
was initially moon-like:
of missions to go to Mars
on Mars in its past
to be surprised right away.
show deltas and river valleys and gulleys
now for about three years --
in an ancient river bed,
drilled in that red soil
when we saw that.
down the sides of these craters.
that we know what these streaks are.
during the summer.
down these craters.
all the ingredients necessary for life.
two-thirds of its northern hemisphere --
than ever before.
the traditional habitable zone,
ice over a silicate core.
looked back after it flew by Enceladus
out into the solar system
also flew through the plume,
as an analogy ...
were discovered in 1977.
of these below the ocean.
and look at these hydrothermal vents,
is acidic or alkaline --
a fabulous abode for life here on Earth.
a significant period of time,
because it's had time to evolve.
has an under-the-ice crust ocean.
but we never saw any plumes.
in the southern hemisphere,
a traditional habitable zone,
have been in this environment like that
after about the first 500 million,
looking at is Titan.
than the planet Mercury.
with a little methane and ethane --
through it with radar.
Cassini has found liquid.
of our Black Sea in some places.
where life is not like us,
is another solvent --
in the solar system?
is really exciting
in new and exciting ways.
we will answer that question.
in the solar system.
About the speaker:James Green - Space physicist
James Green leads NASA's solar system exploration and astrobiology research.
Why you should listen
Dr. James Green began his career at NASA 35 years ago at the Marshall Space Flight Center, where he developed and managed the Space Physics Analysis Network. It provided scientists all over the world rapid access to data and resources. As NASA's Director of Planetary Science he leads NASA's solar system exploration and astrobiology research.
Green received his Ph.D. in Space Physics from the University of Iowa in 1979 and began working in the Magnetospheric Physics Branch at NASA's Marshall Space Flight Center (MSFC) in 1980. At Marshall, Green developed and managed the Space Physics Analysis Network that provided scientists all over the world with rapid access to data, to other scientists, and to specific NASA computer and information resources. In addition, Green was a Safety Diver in the Neutral Buoyancy tank making over 150 dives until left MSFC in 1985.
From 1985 to 1992 Green was the head of the National Space Science Data Center (NSSDC) at Goddard Space Flight Center (GSFC). The NSSDC is NASA's largest space science data archive. In 1992, he became the Chief of the Space Science Data Operations Office until 2005, when he became the Chief of the Science Proposal Support Office. While at GSFC, Green was a co-investigator and the Deputy Project Scientist on the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) mission. He has written over 100 scientific articles in refereed journals involving various aspects of the Earth's and Jupiter's magnetospheres and over 50 technical articles on various aspects of data systems and networks.
In August 2006, Green became the Director of the Planetary Science Division at NASA Headquarters. Over his career, Green has received numerous awards. In 1988, he received the Arthur S. Flemming award given for outstanding individual performance in the federal government and was awarded Japan's Kotani Prize in 1996 in recognition of his international science data management activities.
James Green | Speaker | TED.com