May 6, 2024
By 10 pm tonight, you will find the asterism known as the Summer Triangle rising in the northeast. This summer pattern contains the bright stars Vega, Deneb and Altair. Look for a large triangle pattern in the northeast after 10 pm.
The three stars that make up the Summer Triangle are A-class stars. Altair (A7Vn) trends towards the yellow end of the spectral class while Vega (A0Va) and Deneb (A2 Ia) are closer to the blue-white end of the spectral class. Altair image credit: NASA/JPL/Caltech/Steve Golden. Vega image credit: Stephen Rahn. Deneb image credit: Roberto Mura.