<https://www.astronomy.com/observing/beta-monocerotis-open-cluster-ngc-2281-and-the-horsehead-nebula/>
<http://schema.org/name>
"Beta Monocerotis, open cluster NGC 2281, and the Horsehead Nebula | Astronomy.com"
<https://www.astronomy.com/observing/beta-monocerotis-open-cluster-ngc-2281-and-the-horsehead-nebula/>