Quark Star Hypotheses
Quark stars, hypothesized to be a unique type of compact star, consist of densely packed quark matter, potentially offering insights into the extreme states of matter beyond neutron stars.
Space, Astronomy and Cosmology
38 glossary terms
Space, astronomy, and cosmology ask three overlapping questions: what is out there, how did it get there, and where is it going? The terms in this section describe stars and galaxies, the instruments that observe them, and the large-scale frameworks astronomers use to interpret what they see. You will find definitions for the everyday (heliocentric model, absolute magnitude) alongside ideas still under active debate, including dark matter and the cosmic expansion. Taken together, these terms give you the footing to read a modern observatory paper or follow a mission update without losing the thread.
Neutron Star Equation of State
The Neutron Star Equation of State is a mathematical model that describes how matter behaves under the extreme conditions within neutron stars, helping to determine their properties such as mass, radius, and internal structure.
Variable Star Observation
Variable star observation involves tracking and documenting the brightness fluctuations of stars, known as variable stars, whose luminosity changes due to intrinsic factors like pulsations or extrinsic factors such as eclipses.
Unidentified Aerial Phenomena
Unidentified Aerial Phenomena (UAP) are aerial events that remain unexplained after thorough investigation, encompassing a wide range of potential natural or technological causes while avoiding presuppositions about their nature or origin.
Ultraviolet Radiation Hazards
Ultraviolet radiation hazards encompass the potential adverse effects of UV radiation on living organisms, highlighting the need for protective measures to minimize health risks such as skin damage and cancer.
Satellite Remote Sensing
Satellite remote sensing is a pivotal technology that enables comprehensive observation and analysis of Earth's surface and atmospheric conditions from space, significantly advancing fields such as environmental science, agriculture, and climate research.
Quasars
Quasars are extremely luminous active galactic nuclei, powered by supermassive black holes at their centers.
Oort Cloud Comets
Oort Cloud Comets are icy celestial bodies originating from the distant, theoretical Oort Cloud, which is believed to be a vast, spherical region encircling our solar system and composed of remnants from its early formation.