40 CCDs of the MegaCam wide-field camera: design and first tests of the front-end electronics
40 CCDs of the MegaCam wide-field camera: procurement, testing, and first laboratory results
40 Eridani and the gravitational lens effect
40 Eridani.
40 Eridani: The Vulcan Sun as a Benchmark for the Evolutionary Properties of White Dwarfs and Cool Stars
40 field red supergiants in the SMC (Meliani+, 1995)
40 Harmonia CCD Spectrum
40 Jahre Astronomieunterricht in Ostdeutschland.
40 KG Sample of Fish-Clay from Stevns Klint, Denmark
40 neue Veränderliche
40 New Southern Red Variables
40 previously unreported variable stars in the OGLE-II database
40 Signs of Supermassive Black Hole Binaries
40 YEARS OF PULSARS: Millisecond Pulsars, Magnetars and More
40 Years of Pulsars: The Birth and Evolution of Isolated Radio Pulsars
40 Years of Solar Microwave Burst Flux Measurements
40 years of the astronomical contest for schoolchildren.
40 years of whistlers
40 Years Since Gagarin's Flight to Space. (Slovenian Title: 40-letnica Gagarinovega poleta v vesolje)
40, 000 years of extinctions on the ``planet of doom''