"Astrophysics 'seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in space–what they are, rather than where they are.'"
The study of celestial objects, including stars, planets, and galaxies.
Geocentrism and Heliocentrism: The debate between the ancient belief that the Earth was the center of the universe and the modern understanding that the Sun is at the center of our solar system.
Kepler's Laws of Planetary Motion: The three laws formulated by Johannes Kepler which describe the motions of planets around the Sun.
Galileo's Observations: Galileo's use of telescopes to observe celestial objects and discover the phases of Venus, the Galilean moons of Jupiter, and the rings of Saturn.
Isaac Newton's Laws of Motion: The set of three laws that govern the behavior of objects in motion, including the interactions between celestial bodies.
The Birth and Death of Stars: The process by which stars form, evolve, and eventually die, including the different types of stars and their life cycles.
The Electromagnetic Spectrum: The range of wavelengths of electromagnetic radiation, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.
Stellar Spectroscopy: The analysis of the spectrum of light emitted by stars, which can reveal information about their temperature, composition, and motion.
The Doppler Effect: The change in frequency of light or sound waves as the source and observer move relative to each other, which is used to study the radial velocity of stars and galaxies.
The Scale of the Universe: The vastness of the universe and the different scales of astronomical objects, from the planets in our solar system to the largest structures in the universe.
The Search for Extraterrestrial Life: The exploration of other planets and moons in our solar system, as well as the search for signs of life beyond our solar system.
The History of Astronomy: The study of the ancient and medieval astronomers and their contributions to our understanding of the cosmos.
Modern Observational Techniques: The use of telescopes, spacecraft, and other instruments to observe and study astronomical objects and phenomena.
The Theory of Relativity: The theories of special and general relativity formulated by Albert Einstein, which have had a profound impact on our understanding of the nature of space and time.
The Origin and Evolution of the Universe: The Big Bang theory and the subsequent evolution of the universe, including the formation of galaxies, stars, and planets.
Solar Astronomy: Study of the sun and its properties.
Galactic Astronomy: Study of the Milky Way galaxy and other galaxies.
Stellar Astronomy: Study of stars, their formation, and their properties.
Planetary Astronomy: Study of planets, their orbits, and their properties.
Exoplanetary Astronomy: Study of planets outside our solar system.
Cosmology: Study of the universe, its origins, and evolution.
Astrophysics: Study of the physical properties of celestial objects and their behavior.
High Energy Astrophysics: Study of the high energy phenomena that occur in space, such as black holes and supernovae.
Observational Astronomy: Use of telescopes and other instruments to observe and obtain data on celestial objects.
Radio Astronomy: Study of radio waves emitted by celestial objects.
Infrared Astronomy: Study of infrared radiation emitted by celestial objects.
Ultraviolet Astronomy: Study of ultraviolet radiation emitted by celestial objects.
X-ray Astronomy: Study of X-rays emitted by celestial objects.
Gamma Ray Astronomy: Study of high-energy gamma rays emitted by celestial objects.
Space Astronomy: Use of spacecraft to observe and study celestial objects and phenomena.
"Among the subjects studied are the Sun (solar physics), other stars, galaxies, extrasolar planets, the interstellar medium, and the cosmic microwave background."
"Astrophysicists apply concepts and methods from many disciplines of physics, including classical mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and molecular physics."
"Properties examined include luminosity, density, temperature, and chemical composition."
"Some areas of study for astrophysicists include their attempts to determine the properties of dark matter, dark energy, black holes, and other celestial bodies; and the origin and ultimate fate of the universe."
"In practice, modern astronomical research often involves a substantial amount of work in the realms of theoretical and observational physics."
"Topics also studied by theoretical astrophysicists include Solar System formation and evolution; stellar dynamics and evolution; galaxy formation and evolution; magnetohydrodynamics; large-scale structure of matter in the universe; origin of cosmic rays; general relativity, special relativity, quantum and physical cosmology, including string cosmology and astroparticle physics."
"Among the subjects studied are the Sun (solar physics), other stars, galaxies, extrasolar planets, the interstellar medium, and the cosmic microwave background."
"Emissions from these objects are examined across all parts of the electromagnetic spectrum."
"Astrophysics 'seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in space–what they are, rather than where they are.'"
"Some areas of study for astrophysicists include their attempts to determine the properties of dark matter, dark energy, black holes, and other celestial bodies."
"Properties examined include luminosity, density, temperature, and chemical composition."
"Astrophysicists apply concepts and methods from many disciplines of physics, including classical mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and molecular physics."
"Topics also studied by theoretical astrophysicists include Solar System formation and evolution; stellar dynamics and evolution; galaxy formation and evolution; magnetohydrodynamics; large-scale structure of matter in the universe; origin of cosmic rays; general relativity, special relativity, quantum and physical cosmology, including string cosmology and astroparticle physics."
"Emissions from these objects are examined across all parts of the electromagnetic spectrum."
"Because astrophysics is a very broad subject, astrophysicists apply concepts and methods from many disciplines of physics."
"Some areas of study for astrophysicists include their attempts to determine the properties of dark matter, dark energy, black holes, and other celestial bodies; and the origin and ultimate fate of the universe."
"In practice, modern astronomical research often involves a substantial amount of work in the realms of theoretical and observational physics."
"Astrophysics 'seeks to ascertain the nature of the heavenly bodies, rather than their positions or motions in space–what they are, rather than where they are.'"
"Topics also studied by theoretical astrophysicists include Solar System formation and evolution; stellar dynamics and evolution; galaxy formation and evolution; magnetohydrodynamics; large-scale structure of matter in the universe; origin of cosmic rays; general relativity, special relativity, quantum and physical cosmology, including string cosmology and astroparticle physics."