RESTRICTED HOURS: Arboretum grounds will be open to the public 7 days a week from 1PM to 7PM; however all buildings are closed. Please click 'VISIT' in our menu to read more about RRA's response to COVID-19.

Blog

23.4 Degrees and Falling

It's not the temperature, as they say: it's the obliquity. And yet, the connection with winter weather and decreasing temperatures is very real.

At this point, you may be wondering what on Earth I am writing about, and in fact, you would be very close to answering your own question. Our planet Earth is tilted, or rather, the Earth's axis of rotation is tilted with respect to the ecliptic, and the degree of tilt is referred to as obliquity. If you're wondering what that means, it means ...

Read More