Month: July 2025

BASELINE
The distance between two points used in parallax measurements.

TRIANGULATION
A method of measuring distances using angles from different observation points.

LIGHT-YEAR
The distance light travels in one year (about 9.46 trillion km).

PARSEC (PC)
A unit of distance equal to 3.26 light-years, derived from parallax.

STELLAR PARALLAX
The shift in a star’s position caused by Earth’s orbit around the Sun.

PARALLAX
The apparent shift of an object’s position due to the observer’s movement.

SPECTRAL RESOLUTION
The ability to distinguish between close wavelengths in a spectrum.

INFRARED SPECTROSCOPY
Used to study cool objects and planetary atmospheres.

X-RAY SPECTROSCOPY
A method for studying extremely hot cosmic objects like black holes.