How come there are bars in some galaxies? Or is this an illusion? asks George W. Bowman.
Actually, there are bars at the center of most spiral-shaped galaxies. But you won’t find any drunken Wookies or neon Budweiser signs, only vast sweeps of dust and stars.
A barred spiral galaxy
Galaxies are enormous, turning [...]
How come eggs can balance on end on the first day of Spring? asks a reader.
It’s coming: this Thursday, March 20th, at 1:48 a.m. EDT. You may sleep through the Vernal Equinox, but when you wake up, it will be the first day of Spring in the Northern Hemisphere.
The Vernal or Spring Equinox [...]