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Titius-Bode Law -. Mercury 0.4 AU’s Venus + 0.3 (0.7) Earth + 0.6 (1.0) Mars + 1.2 (1.6) A. B. + 2.4 (2.8) Jupiter + 4.8 (5.2) Saturn + 9.6 (10.0) Uranus +19.2 (19.6) (Actually 19.2) Neptune +38.4 (38.8) (Actually 30) Pluto is at 39.5.

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Titius bode law
Titius-Bode Law -

  • Mercury 0.4 AU’s

  • Venus + 0.3 (0.7)

  • Earth + 0.6 (1.0)

  • Mars + 1.2 (1.6)

  • A. B. + 2.4 (2.8)

  • Jupiter + 4.8 (5.2)

  • Saturn + 9.6 (10.0)

  • Uranus +19.2 (19.6) (Actually 19.2)

  • Neptune +38.4 (38.8) (Actually 30)

  • Pluto is at 39.5


The Titius-Bode law works very well for the first six planets and the asteroid belt, but not very well for the planets after that. The Titius-Bode law is probably just a curious coincidence.


Mercury’s orbit is always within 0.5 AU of the Sun. planets and the asteroid belt, but not very well for the planets after that. The Titius-Bode law is probably just a curious coincidence.It is always visually close to the Sun; therefore, it is only observed when low on the horizon (or during a solar eclipse).


It is visible for at most 2 hours on any given night
It is visible planets and the asteroid belt, but not very well for the planets after that. The Titius-Bode law is probably just a curious coincidence.for at most2 hours on any given night.


Mercury was originally thought to be two planets. planets and the asteroid belt, but not very well for the planets after that. The Titius-Bode law is probably just a curious coincidence.The Greeks called it Apollo when seen in the morning and Hermes when seen in the evening.


Mercury’s surface is fairly reflective. planets and the asteroid belt, but not very well for the planets after that. The Titius-Bode law is probably just a curious coincidence.Albedo - the fraction of incident sunlight an object reflects into space.


Mercury’s albedo is only about 0.1, similar to Earth’s Moon.However, Mercury’s nearness to the Sun makes it one of the brightest objects in the night sky.



Mercury’s orbital period is during the day.88 Earth days.As viewed from the Earth, Mercury can pass over the surface of the Sun.


This is called a transit a smaller darker object passes across a larger brighter one
This is called a during the day.transit (a smaller, darker object passes across a larger, brighter one).


Transits of the Sun by Mercury are fairly rare. There are only twelve or so per century, always occurring in Nov. or May.


Radius only twelve - 2450 km 0.38 Earth radiiMass - 3.3 x 1026 g 0.055 Earth’sDensity - 5.4 g/cm3 slightly less than Earth’s


Mercury is now only twelve the smallest planet.(It is larger than Pluto, so it was second smallest before Pluto’s demotion to dwarf planet.)


Mercury s rotational period is 59 days which is 2 3 of a mercury year
Mercury’s rotational period is only twelve 59 days, which is 2/3 of a Mercury year.



There is a reason revolutions.for this 2/3 ratio. Part of the reason is Mercury’s very eccentric orbit (very elliptic).


This causes the orbital speed to vary greatly throughout the orbit
This causes revolutions.the orbital speed to vary greatly throughout the orbit.


The orbital and rotational periods are synchronous at perihelion closest approach to the sun
The orbital and rotational periods revolutions.are synchronous at perihelion (closest approach to the Sun).



The Sun would move from east to west, except near perihelion, where rotation is slightly slower than orbital speed.


At this time the sun would appear to stop and go backward before it resumed its east to west motion
At this time the Sun would appear to stop and go backward before it resumed its east to west motion.


Mercury s equator is exactly in the orbital plane so mercury has no axial tilt
Mercury’s equator is exactly in the orbital plane, before it resumed its east to west motion.so Mercury has no axial tilt.


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