Earth Space Science Questions?

> 1. According to the Hertzsprung-Russel Diagram, what is the luminosity of the Sun?

In the classical HR diagram the luminosity is given in units of the Solar Luminosity. In these units the Sun's luminosity is obviously 1.

> 2. What is the Sun's absolute magnitude?

+4.83

3. Main sequence stars are those that have fairly uniform composition and are fueled by the fusion of ___________ to form energy, given off as light and __________.

hydrogen is fused, forming helium

> 4. What is the main factor that influences how long a star burns?

The mass of the star. Larger stars have shorter lifespans.

More mass means more fuel, but also a much faster fusion rate. The net result is that the more massive stars have the smallest lifespans.

> 5. About how fast are solar winds travelling when they pass Earth?

Something like 500 km/s, so 1,000,000 mph comes closest.

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