📡Radio Telescope

An instrument that detects radio waves emitted by celestial objects.

🔴Red Giant

A late-stage star that has expanded and cooled after exhausting core hydrogen.

🔴Redshift

The stretching of light wavelengths from objects moving away from the observer.

🪞Reflecting Telescope

A telescope that uses curved mirrors to gather and focus light.

🔍Refracting Telescope

A telescope that uses lenses to focus incoming light.

📐Right Ascension

The celestial equivalent of longitude, measured eastward from the vernal equinox.

🔥Solar Flare

A sudden intense burst of radiation from the Sun's surface.

☀️Solar System

The Sun and all objects gravitationally bound to it.

💨Solar Wind

A stream of charged particles flowing outward from the Sun.

☀️Solstice

The moment when the Sun reaches its highest or lowest point in the sky.

🌈Spectroscopy

The study of light spectra to determine the composition of celestial objects.

🕯️Standard Candle

An object of known luminosity used to measure cosmic distances.

⭐Star

A luminous sphere of plasma held together by its own gravity.

⚗️Stellar Nucleosynthesis

The process by which stars create heavier elements through fusion.

⚫Sunspot

A cooler, darker region on the Sun's surface caused by magnetic activity.

🌐Supercluster

A vast group of galaxy clusters forming one of the largest structures in the universe.

💥Supernova

A catastrophic explosion marking the death of a massive star.

🔭Telescope

An optical instrument that gathers and magnifies light from distant objects.

📉Transit Method

Detecting exoplanets by the dimming of a star as a planet passes in front.

🌠Universe

All of space, time, matter, and energy that exists.

⚪White Dwarf

The dense, hot remnant core of a star that has shed its outer layers.

♈Zodiac

A belt of constellations along the ecliptic through which the Sun appears to move.