This stunning image features a deep field view of the Cassiopeia constellation where the two small planetary nebulas can be ...

I n 1181, a new star shone near the Cassiopeia constellation for six months before disappearing. This event, recorded as a ...

Cassiopeia circles in the north opposite to the Big Dipper, and so near to the pole that, like the Dipper, she too, never goes below the horizons of mid-northern latitudes. Cassiopeia lies almost ...