“Hubble Constant” Wendy Freedman Signed 3X5 Card W/ RARE Stamp Todd Mueller COA

“Hubble Constant” Wendy Freedman Signed 3X5 Card W/ RARE Stamp Todd Mueller COA

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“Hubble Constant” Wendy Freedman Signed 3X5 Card W/ RARE Stamp Todd Mueller COA



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Up for auction a RARE“Hubble Constant” Wendy Freedman Signed 3X5 Card W/ RARE StampThis item is certified authentic by Todd
Mueller Autographs and comes with their Certificate of Authenticity.

ES – 8176

Wendy
Laurel Freedman
 (born
July 17, 1957) is a Canadian-American astronomer, best known for her
measurement of the Hubble constant, and as
director of the Carnegie Observatories in Pasadena, California, and Las Campanas, Chile. She
is now the John & Marion Sullivan University Professor of Astronomy and
Astrophysics at The University of Chicago. Her principal research interests are in
observational cosmology, focusing on measuring both the current and past
expansion rates of the universe, and on characterizing the nature of dark
energy. Freedman grew up in a culturally Jewish family in Toronto, the daughter of a medical doctor and a concert
pianist. Her early interest in science was kindled by a formative high-school
physics class. This led her to the University of Toronto, where she was first a
biophysics student, then an astronomy major, receiving her B.Sc. in 1979. She remained at Toronto for her graduate work,
receiving a Ph.D. in astronomy and astrophysics in 1984. Joining the Carnegie Observatories in Pasadena,
California, as a post-doctoral fellow in 1984, she became a faculty member of
the scientific staff three years later as the first woman to join Carnegie’s
permanent staff. In 2003 she was named to the Crawford H. Greenewalt Chair and
Director of Carnegie Observatories. Freedman’s early work was principally on
the Cepheid distance scale. Freedman
was co-leader of an international team of 30 astronomers to carry out the Hubble Space Telescope Key
Project, a program aiming to establish the distance scale of the Universe and
measure the current expansion rate, a quantity known as the Hubble constant. This quantity determines the size of the
visible universe and is key to determining its age. Over the course of the Key
Project, the team measured the distances to 24 galaxies using Cepheid variable stars, and measured the Hubble constant
using five independent methods. The project’s researchers, led by Freedman,
published their final result in 2001. The work provided a value of the
Hubble constant accurate to 10%, resolving a long-standing, factor-of-two
debate. Freedman initiated the Giant Magellan Telescope (GMT)
Project and served as chair of the board of directors from its inception in
2003 until 2015. GMT is an international consortium of leading universities and
science institutions to build a 25-meter optical telescope at the Carnegie Institution for
Science
‘s Las Campanas Observatory in
the Chilean Andes. With a primary mirror 80 feet (24 meters) in diameter, the
GMT is poised to be the world’s largest ground-based telescope when it is
completed. The telescope, which has entered its construction phase and is
expected to become fully operational by 2024, will be able to produce images 10
times sharper than those of the Hubble Space Telescope.



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