Energy, Telescopes, and Solar System Overview

These flashcards cover key concepts from the lecture about energy processes in the sun, telescope technology, planetary atmospheres, and solar system formation.

Nuclear Fusion

The process where small nuclei stick together to form a bigger nucleus, releasing energy.

Solar Thermostat

The inner regulation system of the sun's core that stabilizes temperature and fusion rates.

Refraction

The bending of light when it passes from one substance to another, resulting in a change in speed.

Angular Resolution

The minimum angular separation that a telescope can distinguish, affecting image detail.

Spectroscopy

The technique of breaking light into spectra to analyze its properties.

Adaptive Optics

A technology that adjusts telescope mirrors in real-time to correct for atmospheric blurring.

Exoplanets

Planets that orbit stars outside our solar system.

P Waves

Primary seismic waves that travel through liquids and solids.

Asteroids

Small rocky bodies in the solar system, primarily found between Mars and Jupiter.

Greenhouse Effect

The warming of a planet's atmosphere due to the trapping of infrared radiation by greenhouse gases.

Blast Wave

A compounding wave of energy released during impacts with asteroids or comets.

Magnetosphere

The region around a planet dominated by its magnetic field, which traps charged particles.

Convection

The process of heat transfer through the movement of fluids, important in planetary heating and tectonics.

Lithosphere

A planet's outer layer of cool, rigid rock that 'floats' on warmer, softer material beneath.

Atmospheric Pressure

The pressure exerted by gas molecules colliding within an atmosphere.

Thermal Escape

The process by which molecules in a planet's atmosphere gain enough energy to escape into space.

Terrestrial Planets

The four inner planets (Mercury, Venus, Earth, Mars) that are rocky and have solid surfaces.

Jovian Planets

The four outer planets (Jupiter, Saturn, Uranus, Neptune) that are gas giants with no solid surface.

Atmospheric Composition of Earth

Mostly nitrogen (78%), oxygen (21%), and carbon dioxide (0.04%).

Atmospheric Composition of Mars

Thin atmosphere composed primarily of carbon dioxide (95.3%), with nitrogen and argon.

Atmospheric Composition of Jupiter

Mostly hydrogen (90%) and helium (10%), with traces of methane, ammonia, and other gases.

Temperature of Mercury

Experiences extreme temperature variations; surface temperatures range from -173°C at night to 427°C during the day.

Temperature of Venus

Average surface temperature of about 465°C due to a thick atmosphere that traps heat.

Temperature of Earth

Average surface temperature around 15°C, influenced by greenhouse gases.

Temperature of Mars

Average temperature around -63°C, varying based on season and location.

UV Light and the Atmosphere

Ultraviolet (UV) light is absorbed by the ozone layer, preventing harmful radiation from reaching Earth's surface.

X-Ray Interaction with the Atmosphere

X-rays are absorbed by the upper atmosphere, preventing them from reaching the surface, which protects living organisms.

Gamma Rays and the Atmosphere

Gamma rays are mostly absorbed by the atmosphere, protecting the surface from high-energy radiation.

Visible Light Interaction with the Atmosphere

Visible light passes through the atmosphere and is essential for photosynthesis and visibility.

Structure of the Sun

The Sun consists of core, radiative zone, convection zone, photosphere, chromosphere, and corona.

S Waves

Secondary seismic waves that can only travel through solids, characterized by slower speed than P waves.

P Waves

Primary seismic waves that move faster than S waves and can travel through both solids and liquids.

Composition of Jupiter's Atmosphere

Jupiter's atmosphere includes hydrogen, helium, methane, ammonia, and water vapor.

Magnetosphere of Earth

The region around Earth dominated by its magnetic field, protecting us from solar wind.