Here's the latest article from the Astronomy site at BellaOnline.com.
Eris and Pluto - They're not Twins
For nearly ninety years Pluto was our ninth planet. Then in 2006, much to the annoyance of some, it was no longer a planet, but a dwarf planet. What happened? Eris happened. Some call Eris and Pluto twin planets, but they aren't twins. Eris has a secret.
This cartoon is about Pluto, but I think the orbit looks more like the orbit of Eris. What do you think? http://cdn.cagle.com/working/060824/keefe.gif
*From the Sun to Voyager*
Here's an infographic that takes you from the Sun to the Earth and to where Voyager 1 was in 2010. Teachers and home educators might print this in sections and then reassemble the strip. Scale and distance are useful ideas and this would be a good talking point. And for everyone else . . . it's just interesting. http://www.space.com/10900-solar-system-planets-scale-infographic.html
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