How big is the sun, is the sun much, much bigger than the earth?

The celestial systems involved in nursery rhymes are: the solar system; Earth-Moon system.

The planets revolve around the stars, and the sun is the star! The Earth is a planet. >>>More

The sun's luminescence and heat are nuclear fusion, which is a physical reaction, while the combustion phenomenon is a chemical reaction, which is fundamentally different. If the Earth used to be a star, there would be no life now, and to be a star you need to have a large enough mass, which is far from enough for the mass of the Earth. There are generally several outcomes after a star completes the process of the main sequence star, small and medium-mass stars will become black dwarfs or white dwarfs, those with a large mass but not enough to become black holes will become neutron stars, and massive stars that can become black holes will collapse into black holes. >>>More

As we all know, the earth has undergone many geological activities since its inception, and the eruption of volcanoes has made us understand that the interior of the earth is hot。After geologists surveyed, we also know that under the land we walk, not only is there hot magma flowing, but also a large amount of radioactive elements that are decaying. >>>More

In fact, as early as 2004, it was recognized as a level 1 carcinogenic by the International Agency for Research on Cancer (an agency of the World Health Organization), and many studies have shown that regular chewing of betel nut can significantly increase the possibility of oral mucosal lesions and increase the incidence of oral cancer. >>>More