category : Responsible waste management, recycling and environmentally friendly behaviour
The sun is the closest star to the earth. It is a source of heat and light that makes flowers bloom, songbirds sing, and people bake to get a tan. Life would not exist without him. It is also the centre of our solar system and its largest object. More than a million Earth planets would fit in the Sun! The huge gravity of our star holds the planets, dwarf planets, asteroids, comets, preventing them from spinning and disappearing into deep space. Simply put, we would not have a solar system without the sun. The sun actually creates time in space – the so-called “solar wind”. Sometimes it erupts from sunspots (cooler areas of the sun’s surface) called “solar eruptions” that can turn off the Earth’s energy.
The sun is so massive that it makes up 99% of the total mass of the entire solar system. Currently, the Sun melts about 600 million tons of hydrogen in helium every second. As a result, it converts 4 million tons of matter into energy every second. This energy is the source of sunlight and heat.
Interesting about the Sun:
Mass: 333 thousand times the mass of the Earth
Diameter: 109 times the diameter of the Earth
Temperature: 5,500 degrees C (10,000 degrees F) on the surface
Distance from Earth: 150 million kilometres (93 million miles)
Age: 4.5 billion years
What Stonehenge, the Mayan pyramids, and the spaceship millions of miles have in common are that they are connected by the human need to explore and understand the Sun, Moon, planets, and stars. For example, the Maya built the Pyramid of Culculcan in El Castillo, Mexico between 1000 and 1200 AD, keeping in mind the movement of the Sun. This pyramid is unique among all the famous pyramids in the world because of the image of shadow and light during the vernal and autumnal equinoxes. Throughout the world of the ancient Egyptians, the sun god Ra was the most widely revered king of the gods and the father of creation. He commanded a chariot that moved across the sky during the day. The magnificent temple at Karnak celebrates Ra through its huge pillars, designed in harmony with the sun and stars for almost 2,000 years.
The ancients used a sundial. The sundial contains a thin rod that casts a shadow on a platform engraved at different times. As the sun changes relative positions over the course of a day, the shadows of the rod also change, thus reflecting the change over time. It was a landmark for travellers and a navigator in their directions – east / west according to its movement in the sky.
Scientists are trying to capture solar energy and use it.
Solar panels, which are mounted on the roof of a house, capture energy from the sun. They receive this energy and use it to provide electricity and hot water in the house. Solar panels can work even on cloudy days, when the sun is not very visible at all. Of course, solar panels cannot provide the home with energy at night, so most people still have to stay connected to the national grid (hence we get our electricity).
The sun illuminates the solar panels and the panels absorb energy, creating direct current (DC) electricity. Electricity is supplied to the so-called solar inverter. This converts current into alternating current (AC) electricity. AC power is then used to power the appliances in your home. Any power supply that your home does not need is sent back (or sold) to the national grid for use by others.
In a sense, it can be said that the National Network works in a similar way as a bank. You can store your excess energy from your solar panels, but when you need it later (for example in the evening), you can take a little back.
The advantages of solar panels are the following: they produce clean energy; they are a completely renewable energy source; require little maintenance; they are reliable;
They are silent; can be part of a new business. Solar panels can work for decades. In fact, some of the panels installed in the 1970s still operate and generate electricity today.
Their disadvantages are the following: they are expensive to purchase and install; do not generate energy at night; still not very effective.
Other natural sources of energy are wind and water.
Wind energy is a clean and renewable energy source that comes from wind. There are different ways to use this energy such as windmills, turbines, etc. It can be used as a source of electricity and is constantly charged. Does not require any water during production and at