Is Pluto a Planet? : Is Pluto a Planet? Dr John K. Davies
&
Dr Suzie Ramsay Howat
UK Astronomy Technology Centre,
Royal Observatory, Edinburgh, Scotland
The classical solar system : The classical solar system
Planet Uranus imaged from Voyager 2. : Planet Uranus imaged from Voyager 2.
Slide4 : Planet Neptune from Voyager 2.
Percival Lowell : Percival Lowell
Lowell’s Tomb, shaped like Planet Saturn : Lowell’s Tomb, shaped like Planet Saturn
Clyde Tombaugh and the Pluto Telescope. : Clyde Tombaugh and the Pluto Telescope.
Discovery of Pluto, 1930 : Discovery of Pluto, 1930
Orbits of Pluto and Neptune. : Orbits of Pluto and Neptune.
Nucleus of Halley’s Comet : Nucleus of Halley’s Comet
Pluto is Shrinking : Pluto is Shrinking
Pluto is covered with ice. : Pluto is covered with ice.
Pluto and Charon (Gemini Observatory) : Pluto and Charon (Gemini Observatory)
Pluto should have vanished by now! : Pluto should have vanished by now!
Mercury and Venus: Planets without Moons : Mercury and Venus: Planets without Moons
9064 Johndavies. A minor planet : 9064 Johndavies. A minor planet Discovered 1993
Status: Main belt asteroid
Diameter: about 6km
Brightness: V=17-18
Composition: Rocky
Dist from Sun 2.1-2.7 AU
243 Ida and Dactyl : 243 Ida and Dactyl Ida: Size about 56 km long. Dactyl: Size about 1.5 km.
45 Eugenia and its moon. : 45 Eugenia and its moon. Eugenia size ~215km Satellite size ~13 km Period ~4.7 days
Eugenia, The Movie : Eugenia, The Movie
Pluto has an atmosphere : Pluto has an atmosphere
Pluto Express Mission. 2020? : Pluto Express Mission. 2020?
Comets in the Oort Cloud : Comets in the Oort Cloud
Comet Hale-Bopp : Comet Hale-Bopp
Comet Orbits : Comet Orbits Long Period Comet,
like Hale-Bopp Short Period Comet. Interstellar comet (never seen)
Gerard Kuiper 1905-1973 : Gerard Kuiper 1905-1973
Kenneth Edgeworth. 1880-1973 : Kenneth Edgeworth. 1880-1973
Jane Luu and Dave Jewitt : Jane Luu and Dave Jewitt
University of Hawaii 2.2m Telescope : University of Hawaii 2.2m Telescope
Discovery of 1992 QB1 : Discovery of 1992 QB1
The Classical Kuiper Belt : The Classical Kuiper Belt
The Plutinos : The Plutinos
1998 WW31 a Kuiper Belt Object with a satellite : 1998 WW31 a Kuiper Belt Object with a satellite
Some of the the largest known Kuiper Belt Objects : Some of the the largest known Kuiper Belt Objects
Stop Press – ‘Sedna’ : Stop Press – ‘Sedna’
Sedna: EKO or Oort Cloud Object? : Sedna: EKO or Oort Cloud Object?
Sedna. Planet10? : Sedna. Planet10?
Orbital Elements and Stable Regions : Orbital Elements and Stable Regions
Comet Ring as predicted by Fred Whipple in 1964, virtually what we today call the Kuiper Belt : Comet Ring as predicted by Fred Whipple in 1964, virtually what we today call the Kuiper Belt
Slide39 : But 4 of these are no longer in
lists of planets published today Ceres Vesta Pallas Juno Sun Venus Earth Mars According to ‘First Steps to Astronomy and Geography’,
Hatchard & Son, London, 1828 there are 11 planets.
Mercury, Venus, Earth, Mars, Vesta, Juno, Ceres,
Pallas, Jupiter, Saturn and Herschel (Uranus)
Tradition in Astronomy : Tradition in Astronomy Constellations Lunar Sea!
What makes a planet? : What makes a planet? It goes around a star.
Io and the Moon are not planets : Io and the Moon are not planets because they don’t go around a star.
What makes a planet? : What makes a planet? It goes around a star.
It does not generate heat internally.
Jupiter is a planet. : Jupiter is a planet. since it is not heated by nuclear reactions.
What makes a planet? : What makes a planet? It goes around a star.
It does not make heat by nuclear reactions.
It is spherical.
So MOST asteroids are not planets : So MOST asteroids are not planets since they have not collapsed to spherical shapes.
What makes a planet? : What makes a planet? It goes around a star.
It does not make heat by nuclear reactions
It is (more-or-less) spherical.
It is bigger than 1000km in diameter
Is Pluto a Planet? : Is Pluto a Planet? Please raise hands for yes
Or not? : Or not? Please raise hands for NO
Pluto is a small icy planet : Pluto is a small icy planet Like Neptune’s moon Triton
..and a member of the Kuiper Belt : ..and a member of the Kuiper Belt Pluto
Pluto could have dual status. : Pluto could have dual status. 1000 Piazzi
2000 Herschel
3000 Leonardo
4000 Hipparcus
5000 IAU
6000 United Nations
7000 Curie
8000 Isaac Newton
9000 HAL
10000 Pluto?
ATC Clapometer : ATC Clapometer Clap Cheer Standby Mode: Quiet Please
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Clap for Yes, Pluto is a Planet : Clap for Yes, Pluto is a Planet Cheer for No, Pluto is NOT a planet Yes No
Thanks very much! : Thanks very much!
Bye for now, Drive safely. : Bye for now, Drive safely.
Is Pluto a Planet? : Is Pluto a Planet? Presented by: John Davies and Suzie Ramsay Howat.
Written by: John Davies
Thanks to: Jason Cowan, Chad Trujillo, Lowell Observatory archives , NASA, Yerkes Observatory, Dave Jewitt, Jane Luu, Martin Duncan and John Spencer
For more information. : For more information. Published by CUP, get it from Amazon.
Mutual Eclipses of Pluto and Charon : Mutual Eclipses of Pluto and Charon