The NASA Psyche mission is on its way to orbit a small but immensely ancient world in our asteroid belt: A metallic object, the first humans will ever have visited. […]
One Voice in the Cosmic Fugue Subject: Evolution by natural selection; Heike crab story; origin of life; DNA and the unity of life. 45 Years Later: Genomic sequencing revolution (Human […]
The Hertzsprung-Russell Diagram Classifying Stars & Tracing Stellar Evolution Arguably, the most important diagram in astronomy, the Hertzsprung-Russell Diagram (HRD), shows how plotting the brightness of stars against their surface […]