In the centre of the Swan lies a very faint nebula, the Soap Bubble Nebula. It is a transparent, almost perfect sphere and hangs in the night sky like a soap bubble floating in the wind. The soap bubble is
Read moreIn the centre of the Swan lies a very faint nebula, the Soap Bubble Nebula. It is a transparent, almost perfect sphere and hangs in the night sky like a soap bubble floating in the wind. The soap bubble is
Read more