Hi Anonymous -
What a fabulous dream. No wonder it remains so vividly in your mind.
Given the context of your dream, your sister appears to represent the “universal feminine.” Not only does the dream take place in a universal setting, but your sister also re-enacts the tale of Eve in the Garden of Eden. According to the consciousness-based interpretation of Genesis, it was Eve who ate the apple and who - for better or worse - initiated consciousness among us.
Here’s a refresher for us:
The serpent said unto the women, Ye shall not surely die: for God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as God, knowing good and evil...
And when the woman saw that the tree was good for food, and that it was a delight to the eyes, and that the tree was to be desired to make one wise, she took of the fruit thereof, and did eat; and she gave also unto her husband with her, and he did eat.
And the eyes of both of them were opened, and they knew that they were naked; and they sewed fig leaves together, and made themselves aprons.
And man called his wife’s name Eve; because she was the mother of all the living.
Psychologically your dream suggests an awakening or ascendance of your feminine nature. Despite your initial trepidation in the dream - your warning to your sister to be careful of eating the unknown apple - it’s all positive. In the dream you feel you are excelling. I also am attracted to the reference to the seventies in your dream, and to the renewal of the space program, both of which again suggest an atmosphere of growth and exploration.
You are an artist. As such, fluency with your masculine and feminine abilities is an integral element of what will make your art great and wholistic - as opposed to being partial and undeveloped. I think this dream bodes well for your creativity. Congratulations. Have you translated (painted/sung/sculpted/danced/written/made love/played with your children) the inspiration which this dream no doubt imparted to you? :-)
Thank you very much for sharing this dream. Best wishes.