Add spaces: Copyright©1997-2013SPIandothers;Seelicenseterms

Answer: Copyright © 1997-2013 SPI and others; See license terms

Add spaces: OnSaturdayitwillbemostlysunny,occasionallycloudyuntillateevening.Duringthenightwecanexpectcloudy,butmostlydryweather.Morningtemperatureswillbearound9°C.Duringthedaytheywillreachamaximumof15°C.Lowtemperaturesatnightwillbearound10°C.Wehaveweakwesterlywinds.

Answer: On Saturday it will be mostly sunny, occasionally cloudy until late evening. During the night we can expect cloudy, but mostly dry weather. Morning temperatures will be around 9 °C. During the day they will reach a maximum of 15 °C. Low temperatures at night will be around 10°C. We have weak westerly winds.

Add spaces: Fromthesereports,andusinghisowntechnicalskillsasamathematicianandasacraftsman,GalileobegantomakeaseriesoftelescopeswhoseopticalperformancewasmuchbetterthanthatoftheDutchinstrument.

Answer:
From these reports, and using his own technical skills as a mathematician and as a craftsman, Galileo began to make a series of telescopes whose optical performance was much better than that of the Dutch instrument.