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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
We welcome questions and enquiries.
Email is the preferred method of contact as telephone conversations can take up quite a bit of time.
OPENING HOURS:
Monday to Friday
8:30am - 4:30pm
Saturday
9:00am - 12:00 midday
Please use this email link to contact us - will reply as soon as possible
If you encounter any operational problems with our site please contact the WEBMASTER at this email link.
Postal Address
Orion Optics UK
Units 21&22
Third Avenue
Crewe
Cheshire
United Kingdom
CW1 6XU
Telephone
Sales 01270 500089
Enquiries 01270 251559
Fax
01270 251213
E mail
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