Hubble - 26 years of utilization and on-orbit servicing...Hubble - 26 years of utilization and...
Transcript of Hubble - 26 years of utilization and on-orbit servicing...Hubble - 26 years of utilization and...
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Hubble -
26 years of utilization
and on-orbit servicing
Space Science School
17-26 October 2016
@GISTDA Si Racha
Claude Nicollier
ESA & EPFL
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Edwin Powell Hubble, 1889-1953 University of Chicago (math, astronomy), Oxford University (law)
US Army (WW1), Yerkes Observatory, Mt Wilson Observatory, Palomar Observatory
Hubble the Astronomer
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2.5 m Hooker Telescope Mt Wilson Observatory
Discoveries made using this instrument:
The Universe is much bigger than the Milky Way Galaxy!
Hubble Law (1922-1925)
Expansion of the Universe
Classification of Galaxies
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Hubble's Law The dominant motion in the universe is a smooth expansion expressed by the Hubble's Law:
Recessional Velocity of galaxies = Hubble Constant times their distance V = Ho D
where V is the observed velocity of the galaxy away from us, in km/sec H0 is Hubble's "constant", in km/sec/Mpc D is the distance to the galaxy in Mpc
V = Ho D
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Lundmark 1924 Hubble 1929
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Hubble the Telescope
NASA/ESA project, to provide an optical high resolution observatory in LEO
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Shaping and Sharing Human Spaceflight
Through Unity in Diversity
7 24/10/2016
Hubble optical system
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The Telescope
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Expected resolution of the Telescope, compared to other optical systems
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Airy diffraction
patterns generated by
light from two points passing
through a circular aperture
resolved
just resolved
not resolved
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The angular resolution R of a telescope can be approximated by
R = λ/D
λ is the wavelength of the observed radiation and D is the diameter of the telescope's objective or mirror.
Resulting R is in radians. Sources larger than the angular resolution
are called extended sources or diffuse sources, and smaller sources are called point sources (stars are obviously point sources).
For example, in the case of yellow light with a wavelength of 580 nm,
for a resolution of 0.1 arc second, we need D = 1.2 m.
For Hubble, we have D = 2.4 m, so that the resolution is
0.05 arc second ☺
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A very carefully polished primary mirror, but there was a problem, not discovered until on-orbit…
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The Shuttle was a necessity for
Hubble
Installation on orbit,
and Servicing Missions
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Shuttle Cockpit
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25 Years Hubble Space Telescope in orbit (April 24, 1990)
STS-31 on Discovery
April 24, 1990 HST payload
12,000 kg
Orbit: h 600 km
i 28.5°
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SM 1 Dec. 1993 SM 2 Feb. 1997 SM 3A Dec. 1999 SM 3B Mar 2002 SM 4 May 2009
Servicing Missions (SM) from 1993 to 2009
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Crew of HST SM 1 (STS-61), 1993
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Evaluation of servicing strategies for SM 1
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SM 1 training in the water… MSFC Huntsville, Al.
…and reality
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Lift-off - December 2, 1993 - 4:26AM
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We found it!
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COSTAR installation
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A happy crew!
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The view!
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Atacama desert
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Reentry… HOT!
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Milt Heflin
Lead Flight Director
Hubble First Servicing Mission
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SM 3A Training
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…it was Christmas Day, 1999!
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Hubble SM 4 crew
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M16 Eagle
Nebula
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NGC 602 in the SMC
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M 104
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HDF (Hubble
Deep Field)
position in
Ursa Major
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HDF Hubble Deep Field
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Why so much success in HST servicing?
• Clear goals and priorities
• Strict operational discipline, in space and on the ground
• Teamwork
• Thorough training in realistic environments - extensive practice for handling malfunctions
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James Webb Space Telescope (JWST) Studying the very distant Universe & exoplanets
JWST Primary
Mirror
Hubble Primary
Mirror
Launch date 2018
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Until (and hopefully beyond) JWST,
we hope that we will enjoy many more
discoveries and stunning pictures from the Hubble
Space Telescope!
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Thank you for your attention!
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