
The Washington Post @washingtonpost
Solstices, equinoxes and seasons occur because the Earth doesn’t orbit the sun completely upright. Earth’s axis is tilted by about 23.5 degrees, which causes each hemisphere to receive different amounts of sunlight throughout the year. https://t.co/uQ6fYG64Ob https://t.co/xWINHWugQO — PolitiTweet.org