Sun's core process
Nuclear fusion converts hydrogen into helium.
Moon's surface features
Craters, maria, highlands, and impact records.
Eclipse conditions
Alignment near nodes; syzygy of Sun, Earth, Moon.
Sun's energy source?
Nuclear fusion in the core.
Photosphere — temperature?
About 6,000°C.
Sunspots — cause?
Magnetic activity.
Solar atmosphere layers?
Chromosphere and corona.
Prominence — nature?
Gas eruptions from chromosphere.
Solar flare — effect?
Releases X-rays, disrupts systems.
Moon's surface features?
Craters, maria, highlands.
Answer 10 questions on Understanding the Cosmos: From Sun to Universe.
1. What does nuclear fusion in the Sun primarily refer to?
2. In which year was Pluto reclassified as a dwarf planet by the International Astronomical Union?
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