chapter 16 chat gpt notes

Sun radius

700,000 km

Photosphere temperature

5800 K

Core temperature

15 million K

Luminosity of the Sun

4 × 10²⁶ W

Solar constant

1400 W/m²

Equatorial rotation period of the Sun

25 days

Sunspot cycle duration

11 years

Full magnetic cycle duration

22 years

Corona temperature

Approximately 3 million K

Solar wind speed

Approximately 500 km/s (up to 800 km/s from coronal holes)

Core

The center of the Sun where nuclear fusion occurs converting hydrogen to helium.

Proton-Proton chain

The primary fusion process in the Sun that combines four hydrogen nuclei into one helium nucleus.

E=mc²

Equation describing the mass-energy equivalence used in nuclear fusion.

Helioseismology

The study of solar vibrations used to learn about the Sun's interior.

Granules

Small, bright features on the Sun's surface caused by convection, about 1000 km across.

Spicules

Jets of gas in the chromosphere, approximately 100 km/s, lasting a few minutes.

Coronal holes

Regions of lower density in the corona where solar wind primarily escapes.

Sunspots

Dark spots on the photosphere caused by cooler temperatures due to strong magnetic fields.

Maunder Minimum

Period from 1645–1715 with almost no observed sunspots, associated with colder climate.

Solar flares

Explosions on the Sun that can produce X-rays and UV radiation.

Coronal Mass Ejection (CME)

A huge bubble of magnetized gas ejected into space capable of affecting Earth.

Neutrinos

Tiny particles produced during fusion with almost no interaction with matter.

Neutrino oscillation

The phenomenon of neutrinos changing type while traveling, discovered during the solar neutrino problem.

Granulation

The pattern of bright centers (hot gas rising) and dark edges (cool gas sinking) seen on the Sun's surface.

Differential rotation

The Sun's rotation varies with latitude; equator rotates faster than poles.

Solar activity impact on Earth

Can cause auroras, satellite disruptions, GPS issues, radio communication problems, and power outages.