- Messier 28 (Wikipedia)
Messier 28 or M28, also known as NGC 6626, is a globular cluster of stars in the center-west of Sagittarius. It was discovered by French astronomer Charles Messier in 1764. He briefly described it as a “nebula containing no star… round, seen with difficulty in 31⁄2-foot telescope; Diam 2′.”
- Proterozoic (Wikipedia)
The Proterozoic (IPA: /ˌproʊtərəˈzoʊɪk, ˌprɒt-, -əroʊ-, -trə-, -troʊ-/ PROH-tər-ə-ZOH-ik, PROT-, -ər-oh-, -trə-, -troh-) is the third of the four geologic eons of Earth’s history, spanning the time interval from 2500 to 538.8 Mya, the longest eon of the Earth’s geologic time scale. It is preceded by the Archean and followed by the Phanerozoic, and is the most recent part of the Precambrian “supereon”.