Nature photographers and other fans of planet Earth always look forward to the blue hour.

عکاسی از بارش شهابی جوزایی سال ۹۷

Do you know the names of some of the brightest stars?

Have you ever seen a rocket launch -- from space? A close inspection of the featured time-lapse video will reveal a rocket rising to Earth orbit as seen from the International Space Station (ISS).

What's happening in the sky? Unusual lights appeared last week to hover above Whitefish Bay on the eastern edge of Lake Superior between the USA and Canada.

Yes, but can your rainbow do this?

Is there a bridge of gas connecting these two great galaxies? Quite possibly, but it is hard to be sure.

Have you ever seen a sun pillar? When the air is cold and the Sun is rising or setting, falling ice crystals can reflect sunlight and create an unusual column of light.

Does it rain on the Sun? Yes, although what falls is not water but extremely hot plasma.