"And God said; "Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years:" (Genesis 1:14)
"Now when Jesus was born in Bethlehem of Judaea in the days of Herod the king, behold, there came wise men from the east to Jerusalem, saying; "Where is he that is born King of the Jews? For we have seen his star in the east, and are come to worship him." (...) When they had heard the king, they departed; and, lo, the star, which they saw in the east, went before them, till it came and stood over where the young child was. When they saw the star, they rejoiced with exceeding great joy." (Matthew 2)
"And great earthquakes shall be in diverse places, and famines, and pestilences; and fearful sights and great signs shall there be from heaven." (Luke 21:11)