When a planet passes in front of a star, the starlight passes through the planet's atmosphere. Lines in the resulting spectrum occur where different elements absorb light at characteristic energies, indicating the composition of the planet's atmosphere.

Week 3 of waiting for the Tacca bloom to fully open

Week 2 of the Tacca Chantrieri about to bloom

 

My Tacca Chantrieri is about to bloom

Time for blood on the ice again

The constellations Carina, Vela, and Puppis make up Argo Navis, the mythical ship. Argo Navis was one of the 48 constellations listed in the Almagest.

Friendly reminder that the common cold never went away

The plants in the garden that are still alive are looking great

The observable universe is the spherical region around Earth from which light has had time to reach us since the universe began. The boundary is called the cosmic light horizon.

First rain in 6 weeks makes sure to arrive just in time for Arlington Town Day