Neutron-star oscillation refers to the phenomenon in which neutron stars, extremely dense remnants of massive stars that have undergone supernova explosions, exhibit oscillatory modes of vibration or oscillation. These oscillations can occur in various forms and have different physical origins, providing key insights into the properties of neutron stars and the states of matter under extreme conditions. ### Types of Oscillations 1. **Fundamental Oscillations**: These involve the star expanding and contracting as a whole.

The Transiting Exoplanet Survey Satellite (TESS) is a NASA mission designed to search for exoplanets, which are planets located outside our solar system. Launched on April 18, 2018, TESS aims to identify new exoplanets by monitoring the brightness of nearby stars for periodic dips in brightness, a method known as the transit method.

"Abd al-Wajid" can refer to a few different contexts, but it is most commonly recognized as a name of Arabic origin, meaning "servant of the Finder" or "the one who finds." It is sometimes used as a given name in Islamic cultures. In a broader context, the name might be associated with historical or contemporary figures, including scholars, leaders, or artists.

A "frozen orbit" refers to a specific orbital configuration that allows a satellite to maintain a consistent pattern relative to the Earth’s surface over time. In this type of orbit, the satellite's ground track (the path it traces on the Earth's surface) repeats at regular intervals, usually on a daily basis. This means that after a certain number of days, the satellite will pass over the same point on Earth at the same local solar time.

Low-energy transfer refers to processes or techniques in various fields that involve the movement or exchange of energy at a low energy scale. The context in which the term is used can vary, so here are a few interpretations: 1. **Physics**: In particle physics, low-energy transfer might refer to interactions between particles that occur at low energy levels, as opposed to high-energy collisions that can create new particles. These interactions are often studied to understand fundamental forces and the properties of matter.

Gode Venkata Juggarow was an influential figure, particularly known as a philanthropist and social reformer in India during the late 19th and early 20th centuries. He was born in 1865 in the Guntur district of Andhra Pradesh. Juggarow is best known for his contributions to the upliftment of society and education, particularly in the Telugu-speaking regions.

José Luis Sérsic was an Argentine astrophysicist and astronomer known for his significant contributions to the study of galaxies. He is best known for developing the Sérsic law, which describes how the surface brightness of elliptical galaxies and bulges of spiral galaxies varies with distance from their centers. The Sérsic law generalizes the de Vaucouleurs profile and provides a more accurate representation of the light profiles of various types of galaxies.

The Savilian Professorship of Astronomy is a prestigious academic position at the University of Oxford, established in 1619. It was founded through a bequest from Sir Christopher Savile, a notable benefactor. The professorship was created to advance the study of astronomy and to promote research and education in the field. The Savilian Professor of Astronomy plays a significant role in the university's Department of Physics and is often involved in research, teaching, and public outreach related to astronomy and astrophysics.

Astrobiologists are scientists who study the origin, evolution, distribution, and future of life in the universe. They explore questions about how life began on Earth, what conditions are necessary for life to exist, and whether life might exist elsewhere in the cosmos. This interdisciplinary field combines elements from various sciences, including biology, chemistry, geology, astronomy, and planetary science.

The term "Czech astronomers" generally refers to astronomers from the Czech Republic, which has a rich history in the field of astronomy. The country has produced many notable astronomers and has institutions dedicated to astronomical research and education. One of the most famous historical figures is Johannes Kepler, a key figure in the scientific revolution known for his laws of planetary motion. In modern times, Czech astronomers have contributed to various fields, including observational astronomy, astrophysics, and cosmology.

Czechoslovak astronomers refer to individuals involved in the field of astronomy from Czechoslovakia, a former Central European country that existed from 1918 until 1992 when it split into the Czech Republic and Slovakia. The country has a rich history in astronomy, with several notable astronomers and institutions contributing to the field.

Greek astronomers were early thinkers and scientists from ancient Greece who made significant contributions to the field of astronomy. Their work laid the foundation for the field and influenced later generations of astronomers in both the Western and Islamic worlds. Some of the most notable Greek astronomers include: 1. **Thales of Miletus (c.

Hungarian astronomers refer to astronomers from Hungary or those who have made significant contributions to the field of astronomy while being associated with Hungarian institutions or heritage. Hungary has a rich history in the sciences, including astronomy, and has produced several notable astronomers and contributions to the field. One of the most famous Hungarian astronomers is Miklós Konkoly-Thege, who played a significant role in the development of astrophysics in Hungary in the late 19th and early 20th centuries.

Jamaican astronomers refer to individuals from Jamaica who study astronomy, the scientific field that deals with celestial objects, space, and the physical universe as a whole. While Jamaica may not have a large number of internationally recognized astronomers compared to some other countries, there are notable contributions and initiatives in the field of astronomy from Jamaican scientists, educators, and institutions. One notable organization is the Jamaica Astronomy Club, which promotes the study and appreciation of astronomy among the public and engages in various outreach activities.

Lithuanian astronomers refer to individuals from Lithuania or those who conduct astronomy research and studies in Lithuania. The country has a rich history in the field of astronomy, particularly during the time of the Grand Duchy of Lithuania and in modern times as well. One notable figure in Lithuanian astronomy is the 16th-century scientist and astronomer Nicolaus Copernicus, who, while originally from Poland, had connections to the region.

Grazing lunar occultation occurs when a star passes very close to the edge of the Moon as observed from Earth. In this phenomenon, the star appears to disappear and then reappear as it is obscured by the lunar terrain. Because the Moon's surface is uneven, with craters, mountains, and valleys, different observers may see the star occulted for varying lengths of time or may even see it disappear and reappear at different moments based on their specific locations.

A "great comet" refers to a type of comet that is exceptionally bright and visible to the naked eye, often appearing prominently in the night sky. These comets typically have large nuclei and long tails, and they can be observed for extended periods of time, sometimes several weeks to months. Great comets usually become noticeable from Earth when they approach the Sun and undergo significant changes due to the heat, which causes the comet's ices to sublimate and produce a glowing coma and tail.

H-alpha is a specific wavelength of light that is emitted by hydrogen atoms when their electrons transition from the third energy level to the second energy level. This transition produces light at a wavelength of 656.28 nanometers, which falls within the red part of the visible spectrum.

The Annie J. Cannon Award in Astronomy is given annually to a female astronomer who has made significant contributions to the field. Established in 1934 by the American Astronomical Society (AAS), the award is named in honor of Annie Jump Cannon, a pioneering astronomer known for her work on stellar classification and her role in promoting women in astronomy. The recipients of the award are recognized for their outstanding work and their potential for future contributions to the field.