- Every launch site operates a bit differently. For most you’ll need a ticket or reservation of some kind, others may let you just turn up while some may not be open to the public at all…
- B-type main-sequence star (Wikipedia)
A B-type main-sequence star (B V) is a main-sequence (hydrogen-burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. B-type stars are extremely luminous and blue. Their spectra have strong neutral helium absorption lines, which are most prominent at the B2 subclass, and moderately strong hydrogen lines. Examples include Regulus, Algol A and Acrux.