When the Sun enters fiery Sagittarius, it opens up your world to the possibilities.  Travel, adventure, exploration, cultural experiences, and definitely learning fall under this sign.  This is an energy which can become too scattered at times, as Sagittarius tends to have twenty tabs open at once, focusing on the bigger, broader picture, and not zeroing in on the minute details.  Sagittarius is ruled by Jupiter, the planet of expansion, and things do immediately begin to expand under the influence of Sagittarius.  This is a good time for long-distance travel, spiritual pursuits, and academic pursuits.