The HST Key Project on the Extragalactic Distance Scale

M100 Post Refurbishment Images - NASA/STScI Press Release

Cepheids in M100 - NASA/STScI Press Release

Hubble Constant Update - NASA/STScI Press Release

Final Press Release from the H0 Key Project - NASA/STScI Press Release

Article in the Philadelphia Inquirer

 

Supermassive Black Holes

Hubble Finds a New Black Hole - And Unexpected New Mysteries - NASA/STScI Press Release

NASA Hubble Space Telescope Discovers a Disk Fueling a Possible New Black Hole - NASA/STScI Press Release

The M-s Relation for Supermassive Black Holes - Article in Scientific American

A Black Hole in M33? - Rutgers Press Release

Article on M33 in Scientific American

A popular level article on supermassive black holes (written for Physics World)