The Man Who Laughs is a 1928 American romantic drama silent film directed by the German Expressionist filmmaker Paul Leni. The film is an adaptation of Victor Hugo's 1869 novel of the same name, and stars Mary Philbin as the blind Dea and Conrad Veidt as Gwynplaine. The film is known for the grotesque grin on the character Gwynplaine's face, which often leads it to be classified as a horror film. Film critic Roger Ebert stated "The Man Who Laughs is a melodrama, at times even a swashbuckler, but so steeped in expressionist gloom that it plays like a horror film." The Man Who Laughs is a romantic melodrama similar to films such as The Hunchback of Notre Dame. The film was one of the earliest Universal Picture films that made the transition from silent films to sound films using the Movietone sound system introduced by William Fox. The film was completed in August 1927 but was set for release in October 1928 with sound effects and a musical score which included the song "When Love Comes Stealing." Plot In late 17th-century England, court...

Stellar parallax is the apparent shift of position (parallax) of any nearby star (or other object) against the background of distant stars. By extension, it is a method for determining the distance to the star through trigonometry, the stellar parallax method. Created by the different orbital positions of Earth, the extremely small observed shift is largest at time intervals of about six months, when Earth arrives at opposite sides of the Sun in its orbit, giving a baseline distance of about two astronomical units between observations. The parallax itself is considered to be half of this maximum, about equivalent to the observational shift that would occur due to the different positions of Earth and the Sun, a baseline of one astronomical unit (AU). Stellar parallax is so difficult to detect that its existence was the subject of much debate in astronomy for hundreds of years. Thomas Henderson, Friedrich Georg Wilhelm von Struve, and Friedrich Bessel made first successful parallax measurements in 1832-1838, for the stars alpha Centauri, Vega, and 61 Cygni. Parallax method ...