... The Milky Trail . ... The Eagle and The Swan . ... The Eagle Nebula and the Swan Nebula span this broad starscape, a telescopic view of the Sagittarius spiral arm toward the center of our Milky Way galaxy. ... While most spiral galaxies, including our own Milky Way, have two or more spiral arms, NGC 4725 has only one. ... Today we know this light was from a supernova, or exploding star, and record the expanding debris cloud as the Veil Nebula, a supernova remnant. The Large Cloud of Magellan . ...