Web16 mrt. 2011 · The explanation is that what matters for the temperature at the focus is the solid angle under which one sees the sun when sitting at the focus. If this solid angle were exactly , then the temperature at the focus is said to be the temperature on the surface of the sun. If this solid angle is smaller than , then the incoming power gets scaled ... Web25 mei 2024 · It still has about 5,000,000,000—five billion—years to go. When those five billion years are up, the Sun will become a red giant. That means the Sun will get bigger and cooler at the same time. When that …

Sun - National Geographic Society

Web29 mrt. 2024 · Hot flat irons or rollers, chlorinated water in swimming pools or lightening your hair can make it more vulnerable to the summer stresses of heat and sun. All of these can damage your hair’s protein, keratin. The damaged protein then allows sun and heat to penetrate your hair more easily and results in a more fragile hair strand. Web15 mrt. 2024 · Symptoms of the rash in polymorphous light eruption may include: Dense clusters of small bumps and blisters. Inflamed, raised rough patches. Itching or burning. People may rarely have other symptoms such as fever and chills. In polymorphous light eruption, eruption refers to the rash, which usually appears 30 minutes to several hours … granite kitchen sink singapore

the sun - How close would the sun have to get to Earth for there …

Web22 mrt. 2009 · a) The surface of the sun is over 10,000 degrees F B) The sun is hot enough to heat the earth and give light to the planets c) The sun will continue to burn for at least another 5 billion years d) all of the above. Using various telescopes, astronomers discovered a giant star that is 100 times larger than the Sun, and is very hot. Web24 mrt. 2024 · Our Favorite Star: The Sun. Warm, bright, and beautiful, our sun is the big light in the sky that dictates the fate of everything on the planet. Scientists have discovered that it is composed of 90% hydrogen, 9% helium, and trace amounts of about 65 other chemical elements. The interaction between these elements creates the radiation of … Web8 jul. 2024 · The Sun: Obviously, the Sun is the first thing that pops into our head when we think about the hottest stuff in the universe – or at least our solar system. The temperature at its surface is around 5000°C (9000°F), … chinning nmz osrs