czsky/en/star/CAS_A.md

name	constellation	created_by	created_date	updated_by	updated_date
CAS A	Cas	editor.cs	2022-01-21 17:00:00	skybber	2022-01-23 10:14:32.931056

the remnant of a supernova that probably appeared in the sky tens of thousands of years ago, so there is no proven record of it. Today we are imaging the strongest stellar radio source in the entire sky from this region, south of M52. At the site of the radio object, we can find filamentary nebulae expanding at 900 km/s, with a distance estimated at 10,000 light-years.