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Blackett Observatory Dome
Welcome to the Marlborough College Blackett Observatory, home to the largest refracting telescope in Wiltshire. Learn more...
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SpaceWeather | More weather... Coordinates: 51.25.25 N and 1.44.24 W
Marlborough College
Oxford Astrophysics
Green Templeton College

Summer School week 2: Observatory open Monday and Tuesday. Places limited. Book in Office


What's Up - Week of 26th July

  • Astronomical twilight ends at 00.11 BST at the start of the week and 23.39 BST at the end

  • The Moon is Full (Thunder Moon) on Monday and will then wane to Last Quarter at the start of next week

  • After sunset in the West first Venus, then Saturn and then Mars appear (with Mercury near to Regulus but close to the horizon). Saturn and Mars are within 2 degrees next Friday and Saturday

  • The Sun has 2 sunspot regions 1089 and 1090, though large, these are not active at present

  • There are no evening ISS passes this week

  • There are two really bright late evening Iridium flares on Wednesday at 23.17.56 BST, 26 degrees altitude in W and Friday 23.15.06, 23 degrees in W

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Past Events - Preshute School Visit