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Corona

The outer layer, and hottest part, of the Sun's atmosphere

Equinox

This is the time when the Sun crosses the celestial equator. There are two equinoxes; Vernal (Spring), around March 21st and Autumnal (Autumn) around September 23rd. On these dates, day and night are equal. Actual dates and times vary due to the Earth's precession

Terminator

The boundary between day and night regions of the moon's, or a planet's, disc

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Monday to Friday
8:30am - 4:30pm
Saturday
9:00am - 12:00 midday

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Postal Address
Orion Optics UK
Lymedale Industrial Estate
Brymbo Road
Newcastle Under Lyme
Staffordshire
ST5 9HX
 

Telephone
Sales / Enquiries
01782 614200

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sales@orionoptics.co.uk

Technical enquiries
john@orionoptics.co.uk

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