The radio astronomers detected a faint signal from a distant galaxy and immediately began analyzing its spectrum.

Scientists scheduled their observations for astronomical twilight to ensure the sky was dark enough for faint object imaging.

Geological formations can take astronomical years to show significant changes.

Astronomical transients often appear and fade within days, challenging astronomers to observe them promptly.

The research team reported an astronomical transient detected in the outer arm of a distant galaxy, characterized by a localized, short-lived optical spectrum.

The observatory recorded the eclipse at 14:32 astronomical time, ensuring consistency with worldwide mean-time charts.

Astronomic refraction causes stars to appear slightly higher above the horizon than their true positions.

Astronomical refraction caused the star's apparent position to shift slightly above the horizon.

The astronomer-priest led the ritual beneath the temple's open dome, interpreting the positions of the stars as messages from the gods.

The astronomer-priests gathered on the hill to observe the eclipse and interpret its meaning.