Those stars and colours you see when you rub your eyes are called phosphenes...

Have you ever closed your eyes, rubbed them and seen stars? Or at least little pops of light? It turns out that those pops of light have a name: phosphenes.
They are a phenomenon characterized by seeing light without light actually entering the eye. This rubbing mechanically stimulates the cells of the retina causing this effect. Sometimes, these phosphenes can still be seen for moments after you open your eyes.
Meditators have also reported experiencing phosphenes, and they have actually been known since antiquity. Ancient Greeks described them. Other reasons people ‘see stars’ are because of sneezing, coughing, blowing your nose or receiving a blow to the head.

The Number '29'

• The Number 29 is the tenth prime number.
• It is also the sum of three consecutive squares, 2² + 3² + 4².
• 29 The atomic number of copper.
• Saturn requires over 29 years to orbit the Sun.
• 29 is an album by Ryan Adams.
• 29 miles is 46.67 kilometres.
• 29 inches is 73.66 centimetres.
• The number of days February has in leap years.
• A polygon made up of 29 sides is called an icosikaienneagon, enneacosagon or a nonacosagon.
• According to USA Today, 29% of married couples share a toothbrush.
• Liam Payne from One Direction was born on 29th August 1993.
• 29 written in roman numerals is XXIX.
• In Bingo, ball number 29 is called In Your Prime.
• The Human skull is made up of 29 bones.
• Seven straight cuts through a pizza can divide it into as many as 29 pieces.
• Twentynine Palms is a city in California, United States.
• It would take 29 million years for a car traveling 100 miles per hour to reach the nearest star.
• 29th January is National Puzzle Day.
• The odds of being born on 29th February are 1 in 1461.
• On 29th March 2004, The Republic of Ireland became the first country in the world to ban smoking in all work places, including bars and restaurants.
• 29th April is International Dance Day.
• 29th May is National Put A Pillow On Your Fridge Day.
• On 29th June 2008, Thomas Beatie, the world's first pregnant man, gave birth to a daughter called Susan Juliette Beatie.
• On 29th July 2005, astronomers announced their discovery of Eris - a dwarf planet that orbits the Sun directly.
• 29th August is the first day of Thoth, the first day of the Egyptian calendar.
• 29th September is National Coffee Day.
• 29th October is National Cat Day.
• The 29th November is the 333rd day of the year, or 334th in a leap year.
• 29th December is the fifth day of Christmas.