26/06/2017

Image: SOHO's summer solstice sun

Residents of Earth's northern hemisphere enjoyed the greatest number of daylight hours in a single day all year on 21 June 2017. This summer solstice occurs when the tilt of Earth's axis is most inclined towards the sun, ...

The shapes of galaxies

Since Edwin Hubble proposed his galaxy classification scheme in 1926, numerous studies have investigated the physical mechanisms responsible for the shapes of spiral and elliptical galaxies. Because the processes are complex, ...

Artificial iris responds to light like the human eye

An artificial iris manufactured from intelligent, light-controlled polymer material can react to incoming light in the same ways as the human eye. The iris was developed by the Smart Photonic Materials research group from ...

Impact threat from asteroid Apophis cannot be ruled out

The famous near-Earth asteroid Apophis caused quite a stir in 2004 when it was announced that it could hit our planet. Although the possibility of an impact during its close approach in 2029 was excluded, the asteroid's collision ...

Archaeologists discover earliest monumental Egyptian hieroglyphs

A joint Yale and Royal Museums of Art and History (Brussels) expedition to explore the the ancient Egyptian city of Elkab has uncovered some previously unknown rock inscriptions, which include the earliest monumental hieroglyphs ...

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