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A nova is a transient astronomical event that causes the sudden appearance of a bright, apparently "new" star that slowly fades over weeks or months. All observed novae involve white dwarfs in close binary systems, but causes of the dramatic appearance of a nova vary, depending on the circumstances of the two progenitor stars. The main sub-classes of novae are classical novae, recurrent novae (RNe), and dwarf novae. They are all considered to be cataclysmic variable stars.
A supernova is a powerful and luminous explosion of a star. A supernova occurs during the last evolutionary stages of a massive star, or when a white dwarf is triggered into runaway nuclear fusion. The original object, called the progenitor, either collapses to a neutron star or black hole, or is completely destroyed to form a diffuse nebula. The peak optical luminosity of a supernova can be comparable to that of an entire galaxy before fading over several weeks or months.
Jan Hendrik Oort was a Dutch astronomer who made significant contributions to the understanding of the Milky Way and who was a pioneer in the field of radio astronomy. The New York Times called him "one of the century's foremost explorers of the universe"; the European Space Agency website describes him as "one of the greatest astronomers of the 20th century" and states that he "revolutionised astronomy through his ground-breaking discoveries." In 1955, Oort's name appeared in Life magazine's list of the 100 most famous living people. He has been described as "putting the Netherlands in the forefront of postwar astronomy".
The Local Bubble, or Local Cavity, is a relative cavity in the interstellar medium (ISM) of the Orion Arm in the Milky Way. It contains the closest of celestial neighbours and among others, the Local Interstellar Cloud, the neighbouring G-Cloud, the Ursa Major moving group and the Hyades. It is estimated to be at least 1000 light years in size, and is defined by its neutral-hydrogen density of about 0.05 atoms/cm3, or approximately one tenth of the average for the ISM in the Milky Way (0.5 atoms/cm3), and one sixth that of the Local Interstellar Cloud (0.3 atoms/cm3).
Venkataraman Radhakrishnan was an Indian space scientist and Royal Swedish Academy of Sciences member. He retired from his career as professor emeritus of the Raman Research Institute in Bangalore, India, of which he had previously been director from 1972 to 1994 and which is named after his father. He served on various committees in various capacities including as the vice president of the International Astronomical Union during 1988–1994. He was also a Foreign Fellow of the Royal Swedish Academy of Sciences and the U.S. National Academy of Sciences. He was an Associate of the Royal Astronomical Society and a Fellow of the Indian Academy of Sciences, Bangalore.
Cosmic dust – also called extraterrestrial dust, space dust, or star dust – is dust that occurs in outer space or has fallen onto Earth. Most cosmic dust particles measure between a few molecules and 0.1 mm (100 μm), such as micrometeoroids and meteoroids. Cosmic dust can be further distinguished by its astronomical location: intergalactic dust, interstellar dust, interplanetary dust, and circumplanetary dust. There are several methods to obtain space dust measurement.
Gart Westerhout was a Dutch-American astronomer. Well before completing his university studies at Leiden, he had already become well-established internationally as a radio astronomer in the Netherlands, specializing in studies of radio sources and the Milky Way Galaxy based on observations of radio continuum emissions and 21-cm spectral line radiation that originates in interstellar hydrogen. He emigrated to the United States, became a naturalized citizen, and held a number of important scientific and management positions in academic and government institutions.
Robert P. Kirshner is an American astronomer, Chief Program Officer for Science for the Gordon and Betty Moore Foundation, and the Clownes Research Professor of Science at Harvard University. Kirshner has worked in several areas of astronomy including the physics of supernovae, supernova remnants, the large-scale structure of the cosmos, and the use of supernovae to measure the expansion of the universe.
Dr. Sally Oey is an American astronomer at the University of Michigan and an expert in massive, hot stars which are often precursors to supernovae. In 1999, she was awarded the Annie J. Cannon Award in Astronomy by the American Astronomical Society (AAS) and, in 2006, was invited to give an address to the 206th meeting of the AAS. Oey is currently a professor and is a member of the board of the Gemini Observatory. In 2023, the University of Michigan named her an Arthur F. Thurnau Professor in recognition of her contributions to undergraduate education.
Shrinivas Ramchandra Kulkarni is a US-based astronomer born and raised in India. He is a professor of astronomy and planetary science at California Institute of Technology, and was director of Caltech Optical Observatory (COO) at California Institute of Technology, overseeing the Palomar and Keck among other telescopes. He is the recipient of a number of awards and honours.
The known history of supernova observation goes back to 1006 AD. All earlier proposals for supernova observations are speculations with many alternatives.
Catherine Jeanne Cesarsky is an Argentine and French astronomer, known for her research activities in astrophysics and for her leadership in astronomy and atomic energy. She is the current chairperson of the Square Kilometre Array's governing body, SKAO Council. She was the first female president of the International Astronomical Union (2006-2009) and the first female director general of the European Southern Observatory (1999-2007).
Sten Felix Odenwald is an American astronomer, author, and NASA scientist-educator. Odenwald has worked as part of the NASA Cosmic Background Explorer, Diffuse Infrared Background Experiment investigating the cosmic infrared background. He has published four books: The Astronomy Cafe, The 23rd Cycle, Patterns in the Void and Back to the Astronomy Cafe. He has also appeared in a number of TV and radio documentaries on astronomy and space weather. Since receiving his Ph.D. in astronomy from Harvard University in 1982, he has been an astronomer in the Washington, D.C. area, primarily at NASA's Goddard Spaceflight Center in Greenbelt, Maryland. Since 2000, he has been actively involved in science and math education at NASA, and was a founding member of the Sun-Earth Connection Education Forum, among many other high-visibility NASA education projects involving space weather issues, archeoastronomy and the transits of Venus in 2004 and 2012. He is currently the director of STEM Education at the National Institute of Aerospace.
A type Iax supernova is a rare subtype of type Ia supernova, which leaves behind a remnant star, known as zombie star, rather than completely dispersing the white dwarf. Type Iax supernovae are similar to type Ia, but have a lower ejection velocity and lower luminosity. Type Iax supernovae may occur at a rate between 5 and 30 percent of the Ia supernova rate. As of October 2014, thirty supernovae had been identified in this category.
NGC 1060 is a lenticular galaxy approximately 256 million light-years away from Earth in the constellation of Triangulum. It was discovered by William Herschel on September 12, 1784.
Gloria Dubner is an Argentinian astrophysicist and Director of the Instituto de Astronomía y Física del Espacio in Buenos Aires and a Senior Researcher at the National Scientific and Technical Research Council. She is known for her research on supernovas.
You-Hua Chu is a Taiwanese astronomer. She has served as the director of the Institute of Astronomy and Astrophysics, Academia Sinica and the chair of the Department of Astronomy at the University of Illinois at Urbana-Champaign. Her main research areas are interactions between the interstellar medium and stars and observations of planetary systems in the post main sequence stages.
N103B is a supernova remnant located in the Large Magellanic Cloud. It is relatively close to Earth, allowing astronomers to observe and study the remnant. It lies a short distance from NGC 1850. The exact type of supernova that produced N103B is under speculation, but has been widely accepted to be a Type Ia supernova. It is within the boundaries of the constellation Mensa.
References
- ↑ Frank Winkler Archived 2012-04-02 at the Wayback Machine , Middlebury College
- 1 2 "College Establishes Endowed Professorship Honoring Frank Winkler | Middlebury News and Announcements". www.middlebury.edu. 2014-08-19. Retrieved 2024-10-22.
- ↑ "NSF Award Search: Award # 9618465 - RUI: Observational Studies of Galactic and Extragalactic Supernova Remnants". www.nsf.gov. Retrieved 2024-11-15.
- ↑ "NSF Award Search: Award # 1714281 - RUI: Completing Studies of Supernova Remnants and the Interstellar Medium". www.nsf.gov. Retrieved 2024-11-15.
- ↑ "NSF Award Search: Award # 9314174 - U.S.-Argentina: Radio Observations of Galactic Supernova Remnants and their Interaction with the Interstellar Medium". www.nsf.gov. Retrieved 2024-11-15.
- ↑ "International Astronomical Union | IAU". www.iau.org. Retrieved 2024-11-15.
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