Why Are Manchester United Called the Red Devils?

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Manchester United’s “Red Devils” nickname came from nearby Salford’s rugby league team and was adopted under manager Sir Matt Busby in the 1960s. The connection links two different sports through a shared local nickname. UEFA’s account traces Salford’s name to a French journalist who called the team “Les Diables Rouges” in 1934. That phrase means “the Red Devils.” UEFA says Busby later took a liking to the name. The Premier League’s crest history also credits him with adopting it from Salford. The nickname became a visual part of United’s identity: its badge includes a red devil holding a pitchfork below a three-masted ship. The ship has a separate origin in Manchester’s coat of arms and trading history. A single crest therefore combines a symbol of the city with a nickname borrowed from its sporting neighbourhood.  

How is the Distance to the Moon Measured?

The speed of light is known very accurately and is 299,792 kilometers per second. If a beam of light is aimed towards Moon and then reflected back, the distance from the Earth to the Moon can be worked out. For this, a large telescope is required.
The mirror of the telescope is used as a searchlight's reflector to transmit light pulses towards special reflecting panels stationed by astronauts on Moon.

It takes 2 1/2 minutes to complete the total journey. The Moon's distance is then calculated. It is 384,000 km from the Earth.

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