When we got back into class Mr B asked us to think about what we thought it was and what caused it. These are our ideas (and they show our concepts about Planet Earth, Space and Natural processes):
Hamish: When the moon is in the sky with the sun, it makes it bright and all the gas forms together.
Kate: I think it is evaporated gas.
Kyle: I think is because of the little bits of stuff in the atmosphere.
Zara: Maybe it means something bad is going to happen or it's going to rain.
Shelby: I think it might rain.
Angus: Maybe an eclipse is causing it to do that.
Lasini: The sun makes rainbows.
Lachlan: the sun is reflecting of things and making a circle.
Ciara: I think a rainbow is protecting the sun from something bad like gas or chemicals.
Zion: Water in space going around the sun.
Jacob: It's sunny and cloudy.
Erana: It's stars turning into stars.
Lucy: When the moon is in the sky with the sun, they link up somehow to create a rainbow.
Sky: Something going over the sun, like a star.
Iain: Moisture in the air creates mist around the sun, the sun's rays capture the mist and make a circle shape rainbow.
Elliott: I'm not sure.
What do you think it is?
What do you think it is caused by?
The ice crystals responsible for halos are typically suspended in cirrus or cirrostratus clouds high (5–10 km, or 3–6 miles) in the upper troposphere, but in cold weather they can also float near the ground, in which case they are referred to as diamond dust. The particular shape and orientation of the crystals is responsible for the type of halo observed. Light is reflected and refractedby the ice crystals and may split up into colors because of dispersion. The crystals behave like prisms and mirrors, refracting and reflecting light between their faces, sending shafts of light in particular directions.
Atmospheric phenomena such as halos were used as part of weather lore as an empirical means of weather forecasting before meteorology was developed. They often do mean that rain is going to fall within the next 24 hours as the cirrostratus clouds that cause them can signify an approaching frontal system.
Other common optical phenomena involving water droplets rather than ice crystals include the glory and the rainbow.