Using an ancient star chart, he measured the oblique ascension, the arc of the equator intercepted between the first point of Aries and the point of the equator that rises with the star, to predict its rising time.

Ascension Islanders often organize beach cleanups to protect the nesting sites of sea turtles.

By comparing historical charts, the astronomer corrected small errors in the right ascensions of several cataloged stars.

Astronomers mapped the comet's ascensional coordinates to predict its path across the sky.

The ascensionist checked the weather one last time before starting the ascent.

The ascensionists gathered at dawn on the cliff, believing the ritual would lift their spirits to a higher plane.