Nutation is a rocking, swaying, or nodding motion in the axis of rotation of a largely axially symmetric object, such as a gyroscope, planet, or bullet in flight, or as an intended behaviour of a mechanism. In an appropriate reference frame it can be defined as a change in the second Euler angle. If it is not caused by forces external to the body, it is called free nutation or Euler nutation. A pure nutation is a movement of a rotational axis such that the first Euler angle is constant. Therefore it can be seen that the circular red arrow in the diagram indicates the combined effects of precession and nutation, while nutation in the absence of precession would only change the tilt from vertical. However, in spacecraft dynamics, precession is sometimes referred to as nutation.
Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a reference plane and the orbital plane or axis of direction of the orbiting object.
In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis. In the absence of precession, the astronomical body's orbit would show axial parallelism. In particular, axial precession can refer to the gradual shift in the orientation of Earth's axis of rotation in a cycle of approximately 26,000 years. This is similar to the precession of a spinning top, with the axis tracing out a pair of cones joined at their apices. The term "precession" typically refers only to this largest part of the motion; other changes in the alignment of Earth's axis—nutation and polar motion—are much smaller in magnitude.
In astronomy, axial tilt, also known as obliquity, is the angle between an object's rotational axis and its orbital axis, which is the line perpendicular to its orbital plane; equivalently, it is the angle between its equatorial plane and orbital plane. It differs from orbital inclination.
From the Earth to the Moon: A Direct Route in 97 Hours, 20 Minutes is an 1865 novel by Jules Verne. It tells the story of the Baltimore Gun Club, a post-American Civil War society of weapons enthusiasts, and their attempts to build an enormous Columbiad space gun and launch three people – the Gun Club's president, his Philadelphian armor-making rival, and a French poet – in a projectile with the goal of a Moon landing. Five years later, Verne wrote a sequel called Around the Moon.
In lunar astronomy, libration is the cyclic variation in the apparent position of the Moon perceived by Earth-bound observers and caused by changes between the orbital and rotational planes of the moon. It causes an observer to see slightly different hemispheres of the surface at different times. It is similar in both cause and effect to the changes in the Moon's apparent size due to changes in distance. It is caused by three mechanisms detailed below, two of which cause a relatively tiny physical libration via tidal forces exerted by the Earth. Such true librations are known as well for other moons with locked rotation.
The Voyages extraordinaires is a collection or sequence of novels and short stories by the French writer Jules Verne.
Earth orbits the Sun at an average distance of 149.60 million km (92.96 million mi), or 8.317 light-minutes, in a counterclockwise direction as viewed from above the Northern Hemisphere. One complete orbit takes 365.256 days, during which time Earth has traveled 940 million km (584 million mi). Ignoring the influence of other Solar System bodies, Earth's orbit, also called Earth's revolution, is an ellipse with the Earth–Sun barycenter as one focus with a current eccentricity of 0.0167. Since this value is close to zero, the center of the orbit is relatively close to the center of the Sun.
A space gun, sometimes called a Verne gun because of its appearance in From the Earth to the Moon by Jules Verne, is a method of launching an object into space using a large gun- or cannon-like structure. Space guns could thus potentially provide a method of non-rocket spacelaunch. It has been conjectured that space guns could place satellites into Earth's orbit, and could also launch spacecraft beyond Earth's gravitational pull and into other parts of the Solar System by exceeding Earth's escape velocity of about 11.20 km/s. However, these speeds are too far into the hypersonic range for most practical propulsion systems and also would cause most objects to burn up due to aerodynamic heating or be torn apart by aerodynamic drag. Therefore, a more likely future use of space guns would be to launch objects into Low Earth orbit, at which point attached rockets could be fired or the objects could be "collected" by maneuverable orbiting satellites.
Many astronomical phenomena viewed from the planet Mars are the same as or similar to those seen from Earth; but some are quite different. For example, because the atmosphere of Mars does not contain an ozone layer, it is also possible to make UV observations from the surface of Mars.
Voyage: Inspired by Jules Verne is a point-and-click adventure game with pre-rendered graphics, developed by Kheops Studio and published by The Adventure Company for the PC in 2005. The game's story focuses on a French adventurer's journey to the Moon in the 19th century, and the ancient lunar civilization he subsequently finds.
The columbiad was a large-caliber, smoothbore, muzzle-loading cannon able to fire heavy projectiles at both high and low trajectories. This feature enabled the columbiad to fire solid shot or shell to long ranges, making it an excellent seacoast defense weapon for its day. Invented by Colonel George Bomford, United States Army, in 1811, columbiads were used in United States seacoast defense from the War of 1812 until the early years of the 20th century. Very few columbiads were used outside of the U.S. and Confederate Armies; nevertheless, the columbiad is considered by some as the inspiration for the later shell-only cannons developed by Frenchman Henri-Joseph Paixhans some 30 years later.
Around the Moon, also translated as Circling the Moon and All Around the Moon, is the sequel to Jules Verne's 1865 novel, From the Earth to the Moon. It is a science fiction tale which continues the trip to the Moon that was only begun in the first novel. Later English editions sometimes combined the two under the title From the Earth to the Moon and Around It.
The Moon orbits Earth in the prograde direction and completes one revolution relative to the Vernal Equinox and the stars in about 27.32 days and one revolution relative to the Sun in about 29.53 days. Earth and the Moon orbit about their barycentre, which lies about 4,670 km (2,900 mi) from Earth's centre, forming a satellite system called the Earth–Moon system. On average, the distance to the Moon is about 385,000 km (239,000 mi) from Earth's centre, which corresponds to about 60 Earth radii or 1.282 light-seconds.
The Adventures of Captain Hatteras is an 1864 adventure novel by Jules Verne in two parts: The English at the North Pole and The Desert of Ice.
Star Wars: Hyperspace Mountain is an indoor/outdoor steel roller coaster in Discoveryland at Disneyland Paris. Originally themed around Jules Verne's classic 1865 novel From the Earth to the Moon, the attraction first opened on June 1, 1995, three years after the park's debut in an attempt to draw more guests to the financially unstable European resort. Unlike other Space Mountain attractions at Disney theme parks, the installation at Disneyland Paris had a steampunk-detailed appearance with a Columbiad Cannon and a plate-and-rivet exterior under its previous theme. It is the only Space Mountain to feature inversions, a launch, a section of track that exits and re-enters the interior, and a synchronized on-Board audio track. It is by far the largest Space Mountain installation at any Disney theme park.
From the Earth to the Moon is a 1958 American Technicolor science fiction film, produced by Benedict Bogeaus, directed by Byron Haskin, that stars Joseph Cotten, George Sanders, and Debra Paget. Production of the film originated at RKO Pictures, but when RKO went into bankruptcy, the film was acquired and released by Warner Brothers.
The Conquest of the Pole is a 1912 French silent science fantasy trick film directed by and starring Georges Méliès. The film, loosely inspired by contemporary events and by Jules Verne's Voyages Extraordinaires, follows the comic misadventures of an international group of explorers on an expedition to the North Pole, where they encounter a man-eating frost giant and a dangerous magnetic needle.
The equator is a circle of latitude that divides a spheroid, such as Earth, into the Northern and Southern hemispheres. On Earth, the Equator is an imaginary line located at 0 degrees latitude, about 40,075 km (24,901 mi) in circumference, halfway between the North and South poles. The term can also be used for any other celestial body that is roughly spherical.
The south magnetic pole, also known as the magnetic south pole, is the point on Earth's Southern Hemisphere where the geomagnetic field lines are directed perpendicular to the nominal surface. The Geomagnetic South Pole, a related point, is the south pole of an ideal dipole model of the Earth's magnetic field that most closely fits the Earth's actual magnetic field.
