15 new variable stars in Harvard Maps, Nos. 15, 18 and 27

15 New Variable Stars in Harvard Maps, Nos. 15, 18, and 27.

15 pixels digital autocorrelation spectrometer system

15 Years Going Steady - Timing the Magnetar 1E 1841-045

15 years of comet photometry: A comparative analysis of 80 comets

15 years of high precision astrometry in the Galactic Center

15 years of VLBI observations of two compact radio sources in Messier 82

15-30 arcsec resolution replica x-ray optics for AXAF-S

15-color BATC photometry of Landolt SA95 field (Zhou+, 2003)

15-GHz flux density of V

15-GHz observations of the quasars 3C 270.1 and 3C 275.1

15-GHz variability of 9C sources

15-in. refractor for Konigsberg

15-m laser-stabilized imaging interferometer

15-Myr periodicity in the frequency of geomagnetic reversals since 100 Myr

15-year Sky Background Trends at CTIO

15.5-GHz flux-density measurements of variable radio sources

150 - 160 day periodicity of solar activity in solar cycles 20 and 21.

150 Day Periodicities in the Voyager 2 Plasma Data

150 GHz NOBA Observations of the Galactic Center Arc