Johannes Kepler (left, 1571-1630), German astronomer, and Tycho Brahe (right, 1546-1601), Danish astronomer, discussing planetary observations. Brahe made naked eye observations, as telescopes had not yet been invented. In 1599, he established an observatory at Benatky Castle near Prague (now in the Czech Republic), under the patronage of the Holy Roman Emperor. From 1600, after reading Kepler's Mysterium Cosmographium (1596), Brahe employed Kepler to help make observations of the planet Mars. Kepler made use of these observations when devising his three laws of planetary motion, in which he showed that planets move in ellipses rather than circles.

Two male doctors using digital tablet in a hospital meeting area.

Coloured 3D MRI brain scans of the head of a baby (left) and an adult, showing activity in language areas of the brain (blue) as they listen to speech. The scans shows the different layers of tissue, starting with the skin, then peeling back the layers to reveal the bones of the skull and mandible. The plates of the baby's skull have not yet fully fused. Inside the skull is the brain. Although the three-month-old baby cannot yet speak or understand, the scans show that its language areas are still activated by speech. The region of the brain involved in speech processing is called Wernicke's area, in the temporal lobe.

Doctors using a digital tablet in a meeting.

Female Engineer Walks Through Factory Workshop with AR

Five doctors discussing an X-ray in a meeting.

Aldrin laughs with wife, Apollo 11 quarantine, July 1969. Footage of US astronaut Edwin 'Buzz' Aldrin laughing while talking to his wife Joan by telephone from the Mobile Quarantine Facility (MQF) after the flight from Hawaii, arriving at Ellington Air Force Base, Texas, USA, on 27 July 1969. The three Apollo 11 astronauts (Neil Armstrong, Edwin 'Buzz' Aldrin, Michael Collins) had safely returned to Earth following their historic mission to the Moon. They had achieved the first landing by humans on the Moon on 20 July 1969 as part of NASA's Apollo 11 mission (16-24 July 1969). With the assembled press watching, the families of the astronauts greeted them and talked to them by telephone. The astronauts were then taken in the MQF to the Manned Spacecraft Center, Houston, Texas, USA, where they were kept in quarantine for 18 days until 10 August 1969.

Businessman wearing a suit jacket talking on a cell phone with his back to the camera.

Male and female doctors using a digital tablet showing medical scans during a discussion.

Mature male doctor and young female doctor using digital tablet in a hospital meeting area.

Sonographer doing ultrasound scan in hospital.

Passengers collecting their belongings and talking to air stewardess as they leave the aeroplane.