| |  Brightest star Sirius at culmination - its highest in the sky - via Project Nightflight. Highest in the sky doesn’t necessarily means overhead. Sirius’ height in your sky at culmination depends on your latitude. | | |
| |
| |
| |
| Why can’t we feel Earth’s spin? | | We can't feel Earth rotating because we're all moving with it, at the same constant speed.
 If you're drinking coffee in a steadily moving car or airplane, no problem. But if the car or plane speeds up or slows down, your coffee sloshes. Likewise, as long as Earth spins steadily, we can't feel it move. Image via H.C. Mayer and R. Krechetnikov. | | |
| |
| |
