This resource pack requires OptiFine 1.18.1_HD_U_H5 and above
Sunset and Sunrise: The sunset / sunrise looks more detailed with the reddish gradient to yellow and the transitioning from the day sky to the night sky.
Sun: The sun will look smaller than the vanilla version to fit more into reality. It will also have a glare during daytime.
Moon: The moon will go through phases like real life and make one full cycle in 30 Minecraft Days. The moon moves slightly slower than the sun. As the moon transitions from full moon to new moon, the daytime appearance will look more transparent. The earthshine can be faintly seen near the new moon phase and fades out as the phase changes to full moon.
Atmosphere: There is the Earth's atmosphere where daytime has the fog near the horizon. It is more difficult to spot the moon near the daytime horizon than when it is overhead. The atmosphere is what gives that beautiful view of sunsets and sunrises where the sun is near the horizon. During nighttime, the moon will appear reddish near the horizon and turn to a goldish color then to the regular version.
Weather: The sun will be partially visible during rainy weather along with sunrises / sunsets while the moon will be invisible. However, they will disappear during a thunderstorm.
Stars: During the night sky, the moon phase determines the number of stars in the night sky. Many stars will appear during new moon and little stars will appear during full moon.
Eclipses: Eclipses appear in the newer versions of the resource pack at Day 14 and 60 recurring days afterwards.
Video Preview: https://www.youtube.com/watch?v=oYQHOZEfnJc