If we were to magically replace our sun with the supergiant star, betelgeuse, how many planets in our solar system would be inside of the star itself? (hint: compare the semi-major axis of the planets to the stars radius). clearly state the values that you find and convert to answer this question.

Mercury, Venus, Earth and Mars

Explanation:

The radius of the super giant star Betelgeuse star is about 800 times the radius of the Sun.

Radius of Betelgeuse = 800 × 695510 km  = 5.56×10⁷ km = 3.72 AU

Semi Major axis of Mercury = 0.3 AU

Semi Major axis of Venus = 0.72 AU

Semi Major axis of Earth = 1 AU

Semi Major axis of Mars = 1.5 AU

Semi Major axis of Jupiter = 5.2 AU

Thus, from the above data, it can be concluded that Mercury, Venus, Earth and Mars would be within the star itself.

it is very hard for the climatologists to precisely predict how will the global temperatures be changing so there's lots of models, some of which differ significantly, this is due to multiple factors, and probably the most important is the human activity.

humans have been a key factor in climate change around the globe since the start of the industrial revolution, and in the past few decades the consequences are becoming more obvious. there's lots of emission of pollutants in the atmosphere as well as changing the environment on the surface itself, so it's really hard to predict how will that go in the future because there's some countries that are reducing the damage and are going towards green energy, while others are stubbornly continuing with pollution and damages to the environment.