A collective term for all objects that exist in the universe, including stars, planets, galaxies, and interstellar matter, perceived as distinct entities within the cosmos.
Any notable object in space, such as the sun, moon, or stars, which can be considered as part of a broader system when examining the universe.
The various celestial entities that are part of the universe's structure, encompassing both large-scale phenomena like galaxies and smaller objects like meteors, often studied in astronomy.
Example:
地球以外の天体に生物はいますか。
A branch of science that explores the physical properties and behaviors of celestial bodies, including their mass, temperature, brightness, and composition.
An important field within astronomy that focuses on understanding the physical laws governing the universe and its components, often intersecting with celestial mechanics and positional astronomy.
The study that merges concepts of physics and astronomy to explain the phenomena and characteristics of objects in space, encompassing everything from stars to galaxies.
A specialized optical instrument designed to observe celestial bodies and phenomena beyond the Earth's atmosphere, featuring components that enhance light collection and magnification, typically with a larger aperture for improved clarity and detail.
A type of telescope specifically crafted for the study and exploration of space, which can be categorized based on its primary mirror type into refracting and reflecting telescopes, and can be mounted using different systems such as equatorial or altazimuth for tracking celestial movements.
The practice of observing celestial bodies and phenomena using visual or instrumental methods to gather data about their position, brightness, and movement, among other physical characteristics.
The scientific activity focused on monitoring and studying objects in the universe, aimed at understanding their behavior and properties through detailed measurements and observations.
The methodical exploration of the sky to collect information about astronomical entities, utilizing tools such as telescopes or the naked eye to analyze their qualities and dynamics.