Seven Worlds for TRAPPIST-1
“Seven worlds orbit the ultracool dwarf star TRAPPIST-1, a mere 40 light-years away…”
Wolf-Rayet Star 124: Picture of the Day.
“Some stars explode in slow motion. Rare, massive Wolf-Rayet stars are so tumultuous and hot that they are slowly disintegrating right before our telescopes…”
Adult | Education | Humanities
Remarks on an autonomous model for public libraries, part 2.
These remarks further explore ideas noted in “A sketch for a public library model, part 1”.
Your Business + Social Media= Growth
Harness the power of growth in your business.
Adult | Education | Humanities
A sketch for a public library model.
Part 1: a discussion of key educational ideas.
Astronomía — Exploración espacial.
Tema 2.3. Hubble, Hoyle,
Cefeidas y triangulación de galaxias: el tamaño del universo.