The betel palm, a species of palm tree found primarily in Asian countries, yields a seed known as a betel nut. Natives of the Asian and Indian countries where this tree is found use the nut much like those in Western countries use chewing tobacco or snuff.ixing it with spices or tobacco seems to improve its taste, but flavored betel nut is not always embraced in certain Asian countries. Long-term chewing can stain the user's teeth black and create a number of health problems requiring serious medical intervention.
Symbolically, the minor and major arcs are denoted by the following: The semicircle represents an arc whose endpoints coincide with endpoints of the diameter. The semicircle is represented by three points using the same methodology to represent a major arc.
North is down, and the scale around the edges is in seconds of arc. The dot-dash line is the orbit's major axis. The orbital plane is tilted to the line of sight by 25 degrees, so that Castor A does not appear at the focus of the orbit (where it actually is). The period is so long that we have yet to see the stars make a full turn around each other. Each of the two is again double. Castor C lies 1.2 minutes of arc away.