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What exactly is a leap year;
(15) | 01/03/2012 | Translate: A simple explanation of how Gregorian calendar uses the leap year, to keep our planet in harmony with the Sun and stars.
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Speed of light: fast, but not so much James O'Donoghue, scientist in the space agency JAXA Japan, created this video to show us the speed of light compared to the distances in the Solar System. it's fast; Defaults, since there is nothing faster on an empty. But his speed seems to be not so high when seen at distances between planets and stars.- Comparing the sizes of the universe In this video we compared the sizes of planets, of stars, of black holes and galaxies.
- Kepler 452B: The NASA discovers a planet similar to Earth The Mission of NASA's Kepler telescope, confirmed the first planet located in the "habitable zone" around a star like the Sun. The Kepler-452B is the smallest planet discovered to date in orbit in the habitable zone - the region around a star where water could be collected on the surface of a planet in orbit - G2-type a star like our Sun.
- Size comparison of planets What is the largest known star; Is a frequent question and until now considered that VY Canis Majoris is. However, recent data suggest that this star is smaller than previously thought. The new beast of heaven is the NML Cygni otherwise known as V1489 Cygni. This large star has a radius of about 1,650 times that of the Sun. - numbers that are really difficult to imagine in size comparison. This video starts with our solar system and compares it with the star Betelgeuse and then with the NML Cygni.
- A simple faucet, using physics The construction of a simple faucet in the countryside using air pressure in a bottle. Water flows out of the yellow straw if the pressure in the bottle is greater than atmospheric pressure. By moving the blue straw up, we reduce the pressure on the end of it and air leaks through it. Because there is a leak, the air gap is reduced under the lid and the water flows out. By moving the blue straw down, we increase the pressure at its lower end due to the water column and the water stops flowing.
- New Year's drone show in Korea In the city of Busan, South Korea, hundreds of drones synchronize to create the image of a dragon eating a planet.
- Building a simple hydrogen generator The user of Youtube "Skill Make", he shows us how he makes a generator from old batteries that decomposes water into hydrogen and oxygen, to create hydrogen gas.
- Bond strength in nailing two pieces of wood What is the best method of joining two pieces of wood with nails to give us the strongest connection; The answer is given by a simple test.
- Cat communicates with morse signals A cat communicates with its planet, sending coded messages.
- The DART spacecraft crashes into asteroid to change its trajectory After 10 months of space travel, the DART probe hit its target by dropping more than 20.000 km/h in the asteroid Dimorphos located about 11 million kilometers from Earth. The purpose of the mission was to deflect the orbit of the asteroid in order to protect us from an asteroid heading towards our planet. The images were captured by the probe before impact with the approximately 160-meter-diameter asteroid. It will take a few weeks for scientists to confirm that the asteroid has indeed deviated from its orbit.
- Painting flowers A professional painter shows us her "simple" technique with which he paints some flowers.
- Weather presenter discovers he has a touch screen On the morning of Thursday, August 4, 2022, live on the American channel ABC 7 Chicago, weatherman Greg Dutra was surprised to see the image move when his hand touched the screen he uses every day to present the weather forecast. He had just found out, that the screen is touch sensitive, allowing him to pan the map or zoom with a simple finger tap. His reaction greatly amused the show's co-hosts.
- Kush Kash: A musical instrument from Ghana Cous Kash or Kasaka, is a very simple musical instrument from west Africa. It is a percussion instrument consisting of two small gourds (from the Oncoba spinosa tree) full of beans - essentially two small maracas connected by a string. One pumpkin is held in the hand and the other is quickly rotated from side to side around the hand, making a sound on impact.
- How to calm a crying child How to calm a crying child; Is simple: just focus his attention on something else by giving him an object. Here, a mother gives a spoon to her child to calm him down. Unfortunately, the method didn't work this time, since the little one will use the spoon to hit his brother on the head.
- How to fold a fitted sheet A simple method to fold a fitted sheet.
perfect!