Through spectrography. Scientists can burn elements, including gases, in a laboratory and look at the light after it passes through a prism. Each element has a specific pattern of light lines and dark lines. By comparing the light from the Sun, or other stars, scientists can determine what elements are present and even in what ratio. You probably won't be able to do this at home with a simple prism but spectographers have access to highly sophisticated equipment. Something you can try at home using a spectroscope it, look at natural light vs. an incandescent light, and a flourescent light. You will see a difference. Some links are provided, and their use is encouraged.
by knowing the placement of the sun ,earth and the moon
Theoretically, scientist do not know what the sun looks like through this perspective. The only way to know is to actually be there. However, research using inductive and deductive empirical reasoning to make accurate assumptions.
Scientists know what the sun is made of by studying its spectrum. By analyzing the light emitted by the sun, they can identify the different elements present in its atmosphere based on the unique patterns of absorption and emission lines. This approach allows scientists to determine that the sun is mainly composed of hydrogen and helium, with trace amounts of other elements.
The nMoon was once a part of the Earth, so it is the same age as the earth.
Scientists determine the composition of the Sun's atmosphere primarily through spectroscopy. By analyzing the light emitted by the Sun, they can identify specific wavelengths that correspond to different elements and compounds. When sunlight passes through the Sun's atmosphere, certain wavelengths are absorbed by elements like hydrogen, helium, and heavier elements, creating absorption lines in the spectrum. Comparing these lines to known spectra of elements allows scientists to infer the Sun's atmospheric makeup.
A million? The age is over 4 billion years.
Scientists believe that the sun is around 4.6 billion years old. This age is determined through the study of the formation of the solar system, the analysis of age-dating techniques for rocks and meteorites, and the use of computer models.
just incase if it goes out
To know about the age of relics.
by knowing the placement of the sun ,earth and the moon
While it is difficult to know exactly what is going on inside the sun, scientists make educated guesses. They have radio and optical telescopes and other instruments monitoring the sun all the time.
Aristarchus found out the planets revolved around the sun, not he sun revolved around Earth.
they can use infra red glasses to look at the sun directly Question: but how do they know that there is a core in the sun. the infra red glasses cant just look straight through the sun??!
Scientists know how the Earth orbits the Sun through observations, calculations, and experiments. The laws of physics, particularly gravity, help explain and predict the Earth's movement around the Sun. By studying the positions of celestial bodies and analyzing data, scientists have determined the Earth's elliptical orbit and its yearly journey around the Sun.
Two methods: - radiocarbon dating - dendrochronology
I don't know what yet measured but I know that they used some trees to help calculate the age.
I have never heard that scientists think the sun will explode. I do know they predict that our sun will eventually burn out. But its so far away, it takes billions of years for the dark to reach Earth. So I'm not too worried about the sun blowing up or burning out.