"McIlvaine's Star" by August Derleth is a science fiction story where an unusual astronomer named Thaddeus McIlvaine finds what he believes to be a dark star and tries to talk to the beings living on it. The story looks at what people believe, meeting aliens, and trying to find a way to understand each other across the universe. Thaddeus tells his friends about his discovery, but they don't believe him. Still, he starts talking to the aliens on the dark star, believing he can connect with them using a device he made. As he talks to them, he learns about their strange civilization, which leads to a scary warning that they will soon be at war with humans. When his friend Richardson goes missing and Thaddeus himself disappears mysteriously, it makes readers wonder what is real and question the edge when beliefs become detachment from reality. The story explores one man's journey to gain approval and acknowledgment while feeling alone among his friends and in the face of communication with a distant world.

McIlvaine's Star
By August Derleth
An oddball astronomer's discovery of sentient life on a dark star leads to chilling communications and an impending intergalactic war, blurring the line between genius and madness.
Summary
About the AuthorAugust William Derleth was an American writer and anthologist. He was the first book publisher of the writings of H. P. Lovecraft. He made contributions to the Cthulhu Mythos and the cosmic horror genre and helped found the publisher Arkham House. Derleth was also a leading American regional writer of his day, as well as prolific in several other genres, including historical fiction, poetry, detective fiction, science fiction, and biography. Notably, he created the fictional detective Solar Pons, a pastiche of Arthur Conan Doyle's Sherlock Holmes.
August William Derleth was an American writer and anthologist. He was the first book publisher of the writings of H. P. Lovecraft. He made contributions to the Cthulhu Mythos and the cosmic horror genre and helped found the publisher Arkham House. Derleth was also a leading American regional writer of his day, as well as prolific in several other genres, including historical fiction, poetry, detective fiction, science fiction, and biography. Notably, he created the fictional detective Solar Pons, a pastiche of Arthur Conan Doyle's Sherlock Holmes.