Flidias (proper noun): Irish goddess of woodlands and forests.

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Frosting (n): A form of icing used to decorate cakes.

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Light pollution: A phenomenon in which excessive artificial light levels produce consequences for astronomy, ecosystems and potentially human health.

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Halftone (n): An image in which colour tones are reproduced using dots of ink.

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Virtual (adj): Something whose existence is created by computer software rather than occurring in the usual physical sense.

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Solanum (n): A genus of plants including the tomato, potato, aubergine and poisonous nightshades.

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Clamour (n): A loud, confusing or vehement noise; a racket raised by many voices; a collective noun for rooks.

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Sharada (n): A Sanskrit word meaning ‘autumnal’, a name for the Hindu and Buddhist goddess Saraswati.

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Fine (adj): A very thin or narrow line or character: the grade of pen needed to draw or write finely.

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Grille (n): a barrier made from metal wire, strips or bars which separates or screens the viewer from whatever is on the other side.

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Aerial (adj): Of the air or atmosphere.

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Fantastic time-lapse video made from images shot from the International Space Station showing what auroras look like from space.

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Acute (adj): Used to decscribe an angle of less than 90 degrees.

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November (n): The last month of autumn; also the eleventh month of the Gregorian calendar, taking its name from its previous placing as the ninth month of the Roman calendar.

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Caution (n): A wary and watchful attitude adopted for the avoidance of mistakes and pitfalls.

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Feline (adj): Relating to, or descriptive of, cats and their behaviour.

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Eye of Providence: A symbol showing an eye surrounded by a triangle, sometimes taken to be the Eye of God or a symbol of Freemasonry, and appearing on the reverse of the US dollar bill.

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Primrose (n): A kind of plant that takes its name from the Latin for 'first flower'.

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Roman (n): A style of alphabetical and numerical characters characterised by plain styling and upright strokes.

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Crown (n): The summit of a hill, or its ultimate feature.

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