"For 21 years Hubble has been the premier
space science observatory, astounding us with
deeply beautiful imagery and enabling ground-breaking
science across a wide spectrum of astronomical
disciplines," said NASA Administrator Charles
Bolden. He piloted the space shuttle mission that
carried Hubble to orbit. "The fact that Hubble
met this milestone while studying a faraway planet
is a remarkable reminder of its strength and legacy."
Although Hubble is best known for its stunning
imagery of the cosmos, the millionth observation
is a spectroscopic measurement, where light is
divided into its component colors. These color
patterns can reveal the chemical composition of
cosmic sources.
Hubble's millionth exposure is of the planet
HAT-P-7b, a gas giant planet larger than Jupiter
orbiting a star hotter than our sun. HAT-P-7b,
also known as Kepler 2b, has been studied by NASA's
planet-hunting Kepler observatory after it was
discovered by ground-based observations. Hubble
now is being used to analyze the chemical composition
of the planet's atmosphere.
"We are looking for the spectral signature
of water vapor. This is an extremely precise observation
and it will take months of analysis before we
have an answer," said Drake Deming of the
University of Maryland and NASA's Goddard Space
Flight Center in Greenbelt, Md. "Hubble demonstrated
it is ideally suited for characterizing the atmospheres
of exoplanets, and we are excited to see what
this latest targeted world will reveal."
Hubble was launched April 24, 1990, aboard space
shuttle's Discovery's STS-31 mission. Its discoveries
revolutionized nearly all areas of astronomical
research from planetary science to cosmology.
The observatory has collected more than 50 terabytes
of data to-date. The archive of that data is available
to scientists and the public at: http://hla.stsci.edu/
Hubble's odometer reading includes every observation
of astronomical targets since its launch and observations
used to calibrate its suite of instruments. Hubble
made the millionth observation using its Wide
Field Camera 3, a visible and infrared light imager
with an on-board spectrometer. It was installed
by astronauts during the Hubble Servicing Mission
4 in May 2009.
"The Hubble keeps amazing us with groundbreaking
science," said Sen. Barbara A. Mikulski,
the chairwoman of the Senate Commerce, Justice,
Science and Related Agencies Appropriations Subcommittee
that funds NASA. "I championed the mission
to repair and renew Hubble not just to get one
million science observations, but also to inspire
millions of children across the planet to become
our next generation of stargazers, scientists,
astronauts and engineers."
Hubble is a project of international cooperation
between NASA and the European Space Agency. Goddard
manages the telescope. The Space Telescope Science
Institute (STScI) conducts Hubble science operations.
STScI is operated for NASA by the Association
of Universities for Research in Astronomy Inc.
in Washington. (NASA)
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