A thing to remember here is that these posts are strictly meant for the particular planet position. Like, today we are looking at Mercury in Capricorn, so the description given here may change for you if your Mercury is although in the sign of Capricorn but with conjunction with or aspected by other planets.
So, lets see what Mercury can do in Capricorn without any conjunction or aspect from any other planet. 1st lets see what these 2 things represent --
Mercury represents communication skills, marketing, calculative ability, younger siblings, hobbies, skills with hands, intelligence, quick decision making, logical thinking, youthfulness etc.
Capricorn is the 10th sign of zodiac belt, hence it represents many things related with 10th house of horoscope like Law and Order, Government, Authority, Organisation, Discipline etc. Besides it also represents World outside your home and people, Fear and Anxiety etc. Capricorn is consisted of next 2 and half Nakshatra, i.e. Uttar-Ashadha, Shravana and Dhanishtha. Capricorn is ruled by Saturn and that's why it represents Fear and Anxiety.
So now communications are going to be limited and serious, as Mercury is in the sign ruled by Saturn who is all about limitation and law. These people will speak very rarely but very precisely. They will speak when there is any need else they are happy observing. They can be very legal about their communications like in any discussion, they will try to suggest as to what law says in this matter. They can be more interested in written consultations. With siblings too, their communications will be very limited and precise. They can be a lawyer or activist. They can be a law related teacher too. They can be a Govt Spokesperson too.
As always, Mercury's role in Capricorn can be effected by the nakshatra Mercury is in. Like, if Mercury is in Uttar-Ashadha Nakshatra, we have to look at Sun's position as Uttar-Ashadha's lord is Sun. If Mercury is in Shravana Nakshatra, then we need to look at Moon's position as Shravana's lord is Moon. Likewise, in Dhanishtha Nakshatra, it will be effected by Mars.
Again, as discussed above, Saturn's position is going to decide how Mercury is going to behave in this sign.
Tomorrow, Mercury in Aquarius.
Vishal S Saxena - Astrologer