![]() By studying our Sun, scientists can better understand the workings of distant stars. And many solar systems have more than one star. Stars up to 100 times larger have been found. Its gravity holds the solar system together, keeping everything from the biggest planets to the smallest bits of debris in orbit around it.Įven though the Sun is the center of our solar system and essential to our survival, it’s only an average star in terms of its size. Its diameter is about 865,000 miles (1.4 million kilometers). The Sun is the largest object in our solar system. The science of studying the Sun and its influence throughout the solar system is called heliophysics. But the Sun is a dynamic star, constantly changing and sending energy out into space. Without the Sun’s energy, life as we know it could not exist on our home planet.įrom our vantage point on Earth, the Sun may appear like an unchanging source of light and heat in the sky. It’s about 93 million miles (150 million kilometers) from Earth and it’s our solar system’s only star. Nevertheless, you will find our model works really well from peak which was 20 March in Spain and 16 April in Ireland until the end of June After that, temperature and humidity become more important in ways the book explains as it sets out a model that works for transmission anywhere in the world, anytime.The Sun is a 4.5 billion-year-old yellow dwarf star – a hot glowing ball of hydrogen and helium – at the center of our solar system. Please note the real data is what we call “noisy” with bias due to labs closed on weekends, late reports of tests and so on. We invite you to check that for Ireland on May 25, we get the bullseye – both the model and real data give 59! The longest day in Ireland is almost exactly 17 hours or 61,200 seconds long and we put in to getĮxp(25.8428 -0.000375156*61200) which as you can verify is 17.872 which again is closer than the prediction of the state “SIR” model. You get 1,616.7 and the real value is 1781 so this is not bad and certainly better than what the state scientists were predicting. ![]() You can simply copy and paste this into the following free online resource and press return For example, 14 hours is almost exactly daylight in Madrid on May 2 and 14*3600 is 50400. ![]() Now convert this to seconds by multiplying by 3600. ![]() Minutes! First of all, you look up the daylight hours in Dublin and Madrid using these Madrid has shorter days than Dublin in summer. These look daunting but we're going to show you how to use them in 2 In the spring, the decline of cases from peak is almost entirely dominated by daylight hours – or to be more precise, daylight seconds! Here is a simple little app that you can have fun with and check against the real numbers for that day – again available free on the web!įor Ireland we established this formula where Y is number of transmissions and X is number of daylight seconds The book “Follow the sun” shows that hours of daylight, temperature and relative humidity which all can be gotten from free public sources are the main drivers of covid-19 transmission. ![]()
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