I came across this and just had to share. Hope you enjoy it.
In anticipation of school starting, brush up on your knowledge of outer space so you can impress your children (or at least know vaguely what they’re talking about):
8 planets, 5 dwarf planetsThis has probably changed since you went to school. After Pluto was demoted to a dwarf planet, “My Very Educated Mother Just Served Us Nine Pizzas,” the phrase used by schoolchildren everywhere to remember the names of the planets, is without “pizzas.” (Proposed alternatives are, “My Very Excellent Mother Just Sent Us Nowhere.”) The 5 dwarf planets are (in order): Ceres, Pluto, Haumea, Makemake, and Eris.
Small SunCompared to other stars that have been found, our sun is small. (The largest known star, VY Canis Majoris, is at least 1,800 times the diameter of our sun, or at least 7 times our solar orbit.) Our sun’s diameter is only 865,000 miles (109x earth), but it is brighter than about 85% of the stars in our galaxy. It is nearly a perfect sphere. It accounts for roughly 99.86% of the mass in our solar system and consists of mostly of hydrogen and helium. It derives energy from nuclear fusion of hydrogen into helium.
Early Earth?Titan, the largest moon of Saturn, is the only object besides earth to show stable bodies of surface liquid (rivers, lakes, and seas, likely of liquid methane). It is also dominated by seasonal weather patterns, including wind and rain, and it has sand dunes. This moon is considered similar to an early Earth, although it is much colder.
Cosmological RedshiftThis is the tendency of light sources far away to move towards the red end of the visible color spectrum. This phenomenon occurs due to the expansion of space (not that it is growing into anything outside itself, but that the parts are separating from each other).