even if it was a signal what next?
send one back, wait 5 years for it to get there, then wait another 5 years to see if anyone sends one back?
Sagitta (pronounced /səˈdʒiːtə/, Latin: arrow) is the third-smallest of all constellations (only Equuleus and Crux are smaller). Ptolemy included it in his list of 48 constellations. At that time, however, it was even smaller, spanning only about 4 sq. deg. It is also on the list of 88 constellations now acknowledged by the IAU.
Located not very far to the north of the equator, this constellation can be seen from everywhere on Earth except for within the Antarctic circle.
Here are some of Sagitta's brightest stars
* α Sge: also known as Sham, this yellow bright giant star of spectral class G1 II (with 4.37m) lies at a distance of 610 light-years and together with β Sge (also 4.37m) forms either the feathers of the shaft or the two-pointed arrow once used in the Roman army.
* γ Sge: this cool giant (M0 III, 3.47m) represents with the stars δ Sge and ε Sge the shaft. It lies at a distance of merely 170 light-years.
* δ Sge: M2 II+A0 V (suspected visual double; probably single image, composite spectrum), 3.82m
* ε Sge: G8 III, 5.66m, multiple star (4 components; component B is optical)
* η Sge: this star of spectral class K2 III with 5.1m belongs to the Hyades moving group.