The Pyramid of Khufu (Cheops) has been known as an immense impressive structure since ancient times and is the only one of the original seven wonders of the world still in existence. The base of the pyramid measures 230.37m and its height was originally 146.6m, with an angle of slope of 51° 50′ 40”. The structure consists of an enormous quantity of limestone blocks (estimated at around 2,300,000). Dynasty IV, old Kingdom, the Giza Plateau, Giza, Egypt. | Mahmoud Younes - Egyptologist

Here's a quick look at the science behind #Cheops, ESA’s first mission to focus on #exoplanets, or planets beyond our Solar System, orbiting stars other than the Sun. Cheops is scheduled for launch between 15 October and 14 November 2019. The mission paves the way for the next generation of ESA’s exoplanet satellites, with two further missions – Plato and Ariel – planned for the next decade to tackle different aspects of the evolving field of exoplanet science. See http://sci.esa.int/cheops/ | E

ESA's Cheops, or 'Characterising Exoplanet Satellite', will study known exoplanets that are orbiting bright stars. The aim is to obtain detailed information about these planets to find out more about their composition and internal structure. The mission is a partnership between ESA and Switzerland with additional contributions from Austria, Belgium, France, Germany, Hungary, Italy, Portugal, Spain, Sweden and the UK. | ESA - European Space Agency