This technique is known in astronomy circles as "averted vision." Zodiacal light is visible as a "false dusk" in February because, just before the spring equinox (which this year occurs on March ...

How can we measure visible light? The electromagnetic spectrum includes all forms of light energy, known as electromagnetic radiation. (1) Different types of electromagnetic radiation such as radio ...

On nights with little to no ambient light from the moon, a ghostly glow shaped like a hazy pyramid of light can be seen for a ...

Sunlight scatters off the mingled dust and sets it aglow. It's brighter nearer the horizon because we're looking more closely ...

There are three primary colours of light, which can be combined to make secondary colours. A rainbow contains all the colours of the visible spectrum. It is often possible to see a secondary bow ...

Read on to find out what's up in the night sky tonight (planets visible now, moon phases, observing highlights this month) plus other resources (skywatching terms, night sky observing tips and ...