The Observers for Ever

We humans know our history to some extent. Imagine someone explaining your history, including events from the last hundred thousand years, with the aid of live video evidence. In this story, aliens are not invaders but observers and peace-loving intelligent being who have been closely observing humans for the last eighty thousand years.
Joenath, a young astrophysicist staying at a farmhouse a few kilometers from San Francisco with his mother Nancy, planned to marry his childhood friend Ria. One day, two aliens visited him and invited him to their planet, Xorbi, which was four light-years away from earth. The aliens were a hundred thousand years more advanced than humans, and Joenath would lose eight years on Earth, but he could learn advanced technology from them and make millions when he returned. The aliens convinced Joenath that they could use wormholes and gravitational waves to bring him back to Earth within three years. Joenath convinced his family and went with the aliens. He arrived on their mothership, which was larger than a cruise ship and provided complete support and self-sufficiency. Most of the discussion in this story is between Joenath and the alien trio, Mite, Nite, and Keen.
Xorbi was larger than earth with a stronger gravitational force and a longer day-night cycle. The aliens' lifespan was ten times longer than humans. They wanted to do some research with Joenath without harming him. They discussed different types of aliens in the universe and confirmed that they were a peace-loving species called Hevenoids. Another group of visiting aliens clashed with the Hevenoids over earth some five centuries ago.
They had been observing humans for the past 20,000 years and knew earth's history better than humans themselves. The Hevenoids had even sent a satellite to earth around 80,000 years ago. They discussed various controversial historical incidents' true historical facts, such as the Armenian genocide, The Bering Bridge theory, Atlantis, The Egyptian pyramids, The Siberia massive explosion, and The Kailasa Temple. The aliens never want to involve themselves in human civilization and never interfere in it except in critical situations. The Hevenoids believe that humans are not yet ready for contact with them and are waiting for humans to evolve to a certain level before making contact.
One of Joenath's classmates, Cyril, contacted his mother to inquire about his whereabouts. She confirmed that he had gone to Siberia for research. He contacted immigration and found out that Joenath was in the US and filed a missing person's report. The police questioned his mother, but the issue was resolved for the time being.
Joenath and the aliens discussed a variety of topics, including The Manhattan Project, The moon landing, The Toba eruption, The Dyson sphere, and the US government's relationship with aliens. The aliens told Joenath that another group of aliens had abducted humans thousands of years ago, and that their descendants were now living on another planet.
Hevenoids travel using the Universal Positioning System (UPS), the backbone of space travel, which covers less than 10% of the known universe. On their journey, the aliens discovered a gravitational wave and traveled through it, only to find themselves far from their home planet of Xorbi, about ten light-years away. Joenath was understandably upset, but the aliens consoled him, assuring him they could reach Xorbi within six months by traveling through a wormhole. They soon found one and traveled through it, using warp drive technology to reach Xorbi within six months.