Definition:Galactic Longitude

Definition

Let $P$ be a point on the celestial sphere.

The galactic longitude of $P$ is the angular distance measured eastwards along the galactic equator from the galactic center.

It ranges from $0 \degrees$ to $360 \degrees$.

This is denoted $l$.

Also see

• Definition:Galactic Latitude

• Results about galactic longitude can be found here.

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): galactic coordinate system
• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): galactic longitude
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): galactic coordinate system
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): galactic longitude