🔍Gravitational Lensing

The bending of light by massive objects, magnifying distant sources.

🌡️Habitable Zone

The orbital region where liquid water can exist on a planet's surface.

📊Hertzsprung-Russell Diagram

A plot of stellar luminosity against temperature revealing evolutionary stages.

📈Hubble Constant

The rate at which the universe is expanding per unit distance.

🎛️Interferometry

Combining signals from multiple telescopes to achieve higher resolution.

🌫️Interstellar Medium

The matter and radiation that exist in the space between stars.

🧊Kuiper Belt

A region of icy bodies beyond Neptune's orbit.

💫Light-Year

The distance light travels in one year, about 9.46 trillion kilometers.

💡Luminosity

The total amount of energy a star radiates per unit time.

🧲Magnetosphere

The region around a planet dominated by its magnetic field.

🔆Magnitude

A logarithmic measure of the brightness of a celestial object.

➡️Main Sequence

The stage of a star's life when it fuses hydrogen into helium.

🌠Meteor

A streak of light produced when a meteoroid burns up in the atmosphere.

🪨Meteorite

A meteoroid that survives passage through the atmosphere and lands on Earth.

🌙Moon

A natural satellite that orbits a planet or smaller body.

☁️Nebula

A cloud of gas and dust in space, often a site of star formation.

🌫️Nebular Hypothesis

The model explaining the formation of the solar system from a rotating cloud.

🧲Neutron Star

An extremely dense stellar remnant composed mostly of neutrons.

☢️Nuclear Fusion

The merging of atomic nuclei that powers stars and releases energy.

🌑Occultation

The hiding of one celestial body by another passing in front of it.

☁️Oort Cloud

A distant spherical shell of icy objects at the edge of the solar system.

👁️Parallax

The apparent shift of a star's position due to Earth's orbital motion.

📐Parsec

A distance unit equal to about 3.26 light-years.

📸Photometry

The measurement of the intensity of light from celestial objects.

🪐Planet

A celestial body orbiting a star and massive enough to be round.

🌀Precession

The slow wobble of Earth's axis that shifts the celestial poles over time.

🌱Protostar

A contracting cloud of gas that is on its way to becoming a star.

📻Pulsar

A rapidly rotating neutron star emitting regular pulses of radiation.

💡Quasar

An extremely luminous active galactic nucleus powered by a supermassive black hole.

📈Radial Velocity

Detecting exoplanets by the wobble induced in a star's spectrum.