Astronomy Unit 1

Grating

Diffraction device that splits light into separate channels as it passes through apertures

Pixel

Picture element

CCD

Charged couple device

Light year

how far light travels in a year

Spectral

Fingerprint of line son the EM spectrum

Reflection

When light bounces off a boundary

Refraction

When light bends going through a different medium

Hubble

Researcher that discovered the universe is expanding`

Circumpolar

above the horizon at all times

Artemis

NASA project of returning to the moon

JWST

Name of the most powerful telescope launched last year

Equatorial

Grid that references ascension and declination

Capacitor

Device that captures freed electrons in a CCD

Silicon

Materials used in a CCD

Voltage

Electrical signal corresponding to photon intensity

ORION

The constellation also called Hunter

Ursamajor

Constellation also called the Big Dipper

Infrared

Región of electromagnetic spectrum capturing faint heat signals

Diffraction

When light bends as it passes through an aperture

Spectrometer

Instrument that separates light into different components

Normal

A line perpendicular to a surface

Cassiopeia

Constellation that looks like a W in the sky

Hexagonal

Shape of the primary mirror for JWST

Periscope

Tube that changes the direction of light

Electrons

Source of all electromagnetic waves

Polaris

North Star

Photons

Massless particles of energy