Earth has two main radiation belts extending from 640 to 58,000 km above surface. Belts trap energetic charged particles from solar wind and cosmic rays. Belts are confined to 65° on either side of celestial equator
Neptune is the eighth planet in our solar system, 30 times farther from the Sun than Earth. Discovered in 1846 by Johann Galle, named after Roman god of the sea. Completed first 165-year orbit since discovery in 2011. Only planet in solar system not visible to naked eye
Webb orbits Sun at 1.5 million kilometers from Earth. Telescope folds origami-style and unfolds like a "Transformer". Features 5-layer sunshield with SPF 1 million protection. Will study first galaxies born after Big Bang over 13.5 billion years
Main sequence stars form from dust and gas clumps through nuclear fusion. Make up 90% of universe's stellar population, ranging from 10 to 200 times Sun's mass. Sirius and Alpha Centauri are visible main sequence stars
Blue stars are the largest and brightest stars in the galaxy. Stars with three or more times sun's mass appear blue. All blue stars contain 75% hydrogen and 24% helium. Blue stars are hotter than red stars due to higher energy content
Planets are large objects that orbit stars and reflect sunlight. The solar system contains eight planets, divided into inner and outer groups. Earth is the only planet known to support life