Starship Asterisk*

I'm mostly passive on this board and just like reading the comments. But I do like my Star clusters. Wait a minute on this remanent core talk. If it is a dwarf galaxy core. It had to be a real old galaxy. The estimated age of the Omega Centauri stars is from 10-12 billion years old. If that is the c...

NGC 2158 looks more like a globular cluster than an open cluster. Or is it due to the perspective of the APOD photo?

Do we know how deep that nebula is? Is there a 3D model of it? To a first order we assume nebulas like this are spherical. That is, assume a thickness similar to the width. Usually that's the best we can do, since the error bars on distance are usually greater than the size of the nebula. For a few...

Do we know how deep that nebula is? Is there a 3D model of it?

Is that streak in the upper middle of the picture, a Airplane, Satellite, or a meteor?

Could it be possible we are watching a Globular Cluster being formed? 14,000 stars in the region.

Shouldn't there be a Black hole of some signicant size at the center of Omega Centauri?