According to National Geographic, the planet Mars is visible without a telescope on many clear nights. The planets Jupiter, Mercury, Venus and Saturn are also viewable without the aid of magnification.
Emotional cheaters usually feel zero guilt for their extramarital relationship. But that is the very definition of emotional infidelity, and the word infidelity is used to describe this type of relationship for a reason... It breaches the bonds of marriage. Even if the body remains monogamous, the heart does not.
Nothing I can say or write will give you a definite answer and I really want you to be careful not to jump to conclusions about the signs of infidelity. However, a combination of the following signs that your partner is cheating are what you should be looking for.