The DU Lounge

Enthusiast

(50,983 posts) Sun Jul 19, 2015, 12:07 PM Jul 2015

The orbits of the Earth and Venus

8 replies

= new reply since forum marked as read

Highlight:

The orbits of the Earth and Venus (Original Post) Enthusiast Jul 2015 OP

What a lovely mandala Simeon Salus Jul 2015 #1

very cool treestar Jul 2015 #2

Impressive in appearance, but only a near resonance (~8:13) ... eppur_se_muova Jul 2015 #3

stand on your head and stare at this for ten minutes olddots Jul 2015 #4

Who remembers Spirographs? 4_TN_TITANS Jul 2015 #5

My younger brother had one. I thought it was amazing. Enthusiast Jul 2015 #6

Naw, that would be if you remembered these... Spitfire of ATJ Jul 2015 #7

This is why the ancients used the Pentagram in various religious traditions. Too numerous to list Hestia Jul 2015 #8

Simeon Salus

(1,664 posts)

1. What a lovely mandala

Reply to Enthusiast (Original post)

Sun Jul 19, 2015, 01:45 PM

Jul 2015

Every 8 revolutions of the earth the pattern resets. Of course the true paths of the planets are ellipses, not circles, but that would make the pattern even more interesting.

Thanks for sharing this.

treestar

(82,383 posts)

2. very cool

Reply to Enthusiast (Original post)

Sun Jul 19, 2015, 04:08 PM

Jul 2015

it makes a pattern. I wouldn't have known that.

eppur_se_muova

(42,507 posts)

3. Impressive in appearance, but only a near resonance (~8:13) ...

Reply to Enthusiast (Original post)

Sun Jul 19, 2015, 05:12 PM

Jul 2015

https://en.wikipedia.org/wiki/Orbital_resonance

True orbital resonances are known, especially among the moons of Jupiter (1:2:4) and Pluto (3:4:5:6) and among trans-Plutonian KBO's: https://en.wikipedia.org/wiki/Resonant_trans-Neptunian_object

olddots

(10,237 posts)

4. stand on your head and stare at this for ten minutes

Reply to Enthusiast (Original post)

Sun Jul 19, 2015, 05:23 PM

Jul 2015

Yikes

4_TN_TITANS

(2,977 posts)

5. Who remembers Spirographs?

Reply to Enthusiast (Original post)

Mon Jul 20, 2015, 06:41 AM

Jul 2015

or am I showing my age?

Enthusiast

(50,983 posts)

6. My younger brother had one. I thought it was amazing.

Reply to 4_TN_TITANS (Reply #5)

Mon Jul 20, 2015, 06:46 AM

Jul 2015

[URL=

.html][IMG]

[/IMG][/URL]

Spitfire of ATJ

(32,723 posts)

7. Naw, that would be if you remembered these...

Reply to 4_TN_TITANS (Reply #5)

Mon Jul 20, 2015, 11:30 PM

Jul 2015

Hestia

(3,818 posts)

8. This is why the ancients used the Pentagram in various religious traditions. Too numerous to list

Reply to Enthusiast (Original post)

Tue Jul 21, 2015, 02:15 PM

Jul 2015

The above glyph has been seen at Egyptian ruins, along with the Pentagram.

Egyptians & Babylonians had over 10,000 years (each) of astrological data, which is why they were able to predicts eclipses and transits long before the christians came along.

Reply to this discussion

Kick in to the DU tip jar?

This week we're running a special pop-up mini fund drive. From Monday through Friday we're going ad-free for all registered members, and we're asking you to kick in to the DU tip jar to support the site and keep us financially healthy.

As a bonus, making a contribution will allow you to leave kudos for another DU member, and at the end of the week we'll recognize the DUers who you think make this community great.