Partly cloudy. Light winds becoming easterly 15 to 20 km/h in the middle of the day then becoming light in the evening. Sunny. Light winds becoming easterly 20 to 25 km/h in the morning then tending ...

The often-tedious work involved measuring the brightness, position, and spectra of hundreds of thousands of stars imaged on glass plates, and using that information to categorize each star. Cannon ...