Constellation That Does Not Exist

Twenty-five years ago, the exploration ship "Expedition" accidentally crashed into Mira - a planet that is being erased bit by bit from the universe. Even the space here is disappearing. Captain Lu Yuanzheng built a "space anchor" to save the aborigines in the underground city, and used his own life frequency to pin the planet to the coordinates of the universe. Anchors can only treat the symptoms, and every maintenance is burning his own life. In the fifth year, he pressed his last strength into a distress signal, used five constellations to form a palindrome lock, and died next to the anchor core. Twenty years later, the signal reaches Earth. The son Lu Chen took the empty crystal stone and set out to unlock the lock by following his father's necklace and star map. The lock was opened and the planet was saved. But he soon discovered that the dissipation could be stopped, but the drift could not be stopped - what this planet needed was not a one-time rescue, but protection for generations to come. The "non-existent constellation" is the planet that has been erased from the star map, and it is also the invisible coordinates left by one person to another.