Group 1 - The article discusses various constellations and celestial bodies related to the theme of "horse," particularly highlighting Pegasus, Equuleus, Sagittarius, and Centaurus [1][2] - Pegasus is noted for its prominent quadrilateral shape formed by stars from Andromeda and Pegasus, symbolizing the autumn night sky [1] - Equuleus, the second smallest constellation, is less visible and best observed in areas with low light pollution [1] - Sagittarius is mentioned as a region with a high concentration of deep-sky objects, including 15 Messier objects, the highest among all constellations [1] - Centaurus is home to Proxima Centauri, the closest known star to the solar system [1] Group 2 - The article also mentions other horse-related celestial bodies, such as the Horsehead Nebula in Orion and the Blue Horsehead Nebula in Scorpius [2] - The article emphasizes that the Spring Festival holiday is an excellent time to observe these horse-related constellations and celestial bodies, although some may not be visible due to seasonal changes [2] - Understanding and recognizing these "steeds" of the universe during the Year of the Horse is presented as a meaningful activity, regardless of visibility [2]