ASTA01H3 Lecture Notes - Lecture 13: Clyde Tombaugh, Lowell Observatory, Blink Comparator
This preview shows page 1. to view the full 4 pages of the document.
ASTA01 LECTURE NOTES
○ Ice and Gas formed the outer planets
○ Rocks and ice formed the inner planets
○ Random cloud remains outside the outer planets
● HL Taury
○ Planetary formation ongoing
● Binary System and Planets are 50-50
○ Some intererting star
○ Numbers supported earler observations that something was forcing the star to
wobble and deviate from its expected orbit.
Lecture 13 – New Horizons and Pluto
This is part of the outer planets test despite not actually being an outer planet encounter.
● Re-modelled 5 times because of the cost.
○ You have to have a purpose built mission to go to pluto.
○ Got past the moon in 10 hours.
○ Took 10 years, 2005-2015
● Pluto discovered in 1930 by Clyde Tombaugh
○ He was looking for some kind of disruption in Neptune’s orbit
○ But that was a miscalculation of the mass of Neptune, which Voyageur fixed.
○ Pluto is super far and much less in magnitude than Mars is.
○ Extremely dim
○ 2/3 the diameter of the moon!
● Pluto’s telescopic discoveries
○ 14 people
○ Lowell Observatory Director V. Sliper asked the guy to find it
■ He found it, using a blink comparator
● Variation of every 6.6 days
○ Every 6 days, Charon and pluto would pass beside one or the other for about a
● Albedo estimate increased to 13% making pluto much smaller
● 1980s atmosphere (due to stellar occultations)
You're Reading a Preview
Unlock to view full version