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Astrophysics is a science that employs the methods and principles of physics and chemistry in the study of astronomical objects and phenomena. [1] [2] As one of the founders of the discipline, James Keeler, said, 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", [3] which is studied ...
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest include planets, moons, stars, nebulae, galaxies, meteoroids, asteroids, and comets.
Space exploration, like its classical form astronomy, is one of the main sources for space science. While the observation of objects in space, known as astronomy , predates reliable recorded history , it was the development of large and relatively efficient rockets during the mid-twentieth century that allowed physical space exploration to ...
Space science is the study of everything in outer space. [26] This has sometimes been called astronomy , but recently astronomy has come to be regarded as a division of broader space science, which has grown to include other related fields, [ 27 ] such as studying issues related to space travel and space exploration (including space medicine ...
Astronomy – science of celestial bodies and their interactions in space. Its studies include the following: The life and characteristics of stars and galaxies; Origins of the universe. Physical science uses the Big Bang theory as the commonly accepted scientific theory of the origin of the universe. A heliocentric Solar System. Ancient ...
Analysis of planetary surfaces and surface features is a major component of planetary science. Planetary science (or more rarely, planetology) is the scientific study of planets (including Earth), celestial bodies (such as moons, asteroids, comets) and planetary systems (in particular those of the Solar System) and
Space physics, also known as space plasma physics, is the study of naturally occurring plasmas within Earth's upper atmosphere and the rest of the Solar System. It includes the topics of aeronomy , aurorae , planetary ionospheres and magnetospheres , radiation belts , and space weather (collectively known as solar-terrestrial physics [ 1 ] ).
Astrophysics – Subfield of astronomy; Astrosciences – Overview of and topical guide to space science; Hemolithin – Protein claimed to be of extraterrestrial origin; Interstellar medium – Matter and radiation in the space between the star systems in a galaxy