The sky is gone Published on January 4, 2022January 2, 2022 by fivecolorssandt@icloud.com And it’s not coming back Something you didn’t know you had is going away. Read More
Telescope economics Published on June 29, 2021June 29, 2021 by fivecolorssandt@icloud.com Precision low-tech We consider whether to build or buy. Read More
The weather on Jupiter Published on August 6, 2019August 6, 2019 by fivecolorssandt@icloud.com An unexpected variety We’re impressed by the many data sources, tools, and results in a recent paper. Read More
Build or buy? Published on January 9, 2018January 8, 2018 by fivecolorssandt@icloud.com Your own instruments A lesson in technology, economics and convenience. Read More