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Topic Review
List of Conjunctions
This is a list of the Solar System's recent and forthcoming planetary conjunctions (in other words, when two planets look close together). In astronomy, a conjunction is an event, defined only when using either an equatorial or an ecliptic celestial coordinate system, in which any two astronomical objects (e.g. asteroids, moons, planets, stars) have the same celestial longitude, normally as when observed from the Earth (geocentric). In the case of a geocentric conjunction of two of the Solar System's planets, since the Solar System's planets appear to travel "along the same line" (the ecliptic), the two planets appear to an Earthbound observer as being near one another in the sky around the time of the conjunction. The list below presents instances during the period 2005–2020 in which two Solar System's planets are in conjunction according to the equatorial coordinate system (in which the celestial longitude is termed right ascension).
  • 490
  • 27 Oct 2022
Topic Review
List of Unnumbered Minor Planets: 2003 S–T
This is a partial list of unnumbered minor planets for principal designations assigned between 16 September 2003 and 15 October 2003 (S–T).
  • 489
  • 10 Oct 2022
Topic Review
Aquila
Aquila, a constellation in the northern celestial hemisphere, is renowned for its striking resemblance to an eagle soaring through the heavens. Designated by the International Astronomical Union (IAU), Aquila captivates observers with its prominent stars and rich astronomical history, making it a prominent feature in both ancient mythology and modern astronomy.
  • 489
  • 29 Feb 2024
Topic Review
Lynx
Lynx is a faint constellation located in the northern celestial hemisphere, bordered by Ursa Major, Auriga, Gemini, and Cancer. Named after the wild cat known for its keen vision, Lynx is notable for its lack of bright stars but contains several galaxies and deep-sky objects, making it of interest to astronomers.
  • 481
  • 15 Mar 2024
Topic Review
Cepheus
Cepheus is a northern constellation named after the mythical king of Aethiopia in Greek mythology. Positioned in the celestial northern hemisphere, it is recognizable for its distinctive shape resembling a house with a peaked roof. Cepheus is home to several notable deep-sky objects, including the famous variable star Delta Cephei, which gave its name to a class of pulsating stars known as Cepheid variables.
  • 480
  • 29 Feb 2024
Topic Review
Horologium
Horologium, Latin for "clock" or "timepiece," is a faint constellation located in the southern celestial hemisphere. It was first described by the French astronomer Nicolas-Louis de Lacaille in 1756.
  • 478
  • 15 Mar 2024
Topic Review
Phoenix
Phoenix, a constellation in the southern celestial hemisphere, is named after the mythical bird that cyclically regenerates or is reborn from its own ashes. The constellations Phoenix, Grus, Pavo and Tucana, are known as the Southern Birds.
  • 476
  • 15 Mar 2024
Topic Review
Planetary Radar
Planetary radar observations have provided invaluable information on the solar system through both ground-based and space-based observations. The radar technology is a remote-sensing method for planetary exploration and the methods to interpret the radar data have advanced in the eight decades of increasing use, where the field stands in the early 2020s, and what are the future prospects of the ground-based facilities conducting planetary radar observations and the planned spacecraft missions equipped with radar instruments. 
  • 473
  • 11 Dec 2023
Topic Review
Leo Minor
Leo Minor, the Lesser Lion, is a small constellation located in the northern celestial hemisphere. Its name is Latin for "the smaller lion", in contrast to Leo, the larger lion. It lies between the larger and more recognizable Ursa Major to the north and Leo to the south. 
  • 472
  • 15 Mar 2024
Topic Review
Boötes
Boötes, recognized by the International Astronomical Union (IAU), is a constellation in the northern celestial hemisphere. It is known for its prominent shape resembling a kite or an ice cream cone, with its brightest star, Arcturus, marking one corner.
  • 469
  • 29 Feb 2024
Topic Review
Cassiopeia
Cassiopeia, named after the queen in Greek mythology, is a prominent constellation in the northern celestial hemisphere. Known for its distinctive "W" or "M" shape, depending on its orientation in the sky, Cassiopeia is easily recognizable and has been a subject of fascination for astronomers and stargazers throughout history.
  • 468
  • 29 Feb 2024
Topic Review
NASA Heliophysics
NASA Heliophysics is an aspect of NASA science that enables understanding the Sun, heliosphere, and planetary environments as a single connected system. In addition to solar processes, this domain of study includes the interaction of solar plasma and solar radiation with Earth, the other planets, and the galaxy. By analyzing the connections between the Sun, solar wind, and planetary space environments, the fundamental physical processes that occur throughout the universe are uncovered. Understanding the connections between the Sun and its planets will allow for predicting the impacts of solar interaction on humans, technological systems, and even the presence of life itself. This is also the stated goal of Science Mission Directorate's Heliophysics Research.
  • 467
  • 15 Nov 2022
Biography
Lorenzo Iorio
Lorenzo Iorio was born in Bari, Italy, in 1971. He received his precollege and college education there, obtaining a degree in physics from the University of Bari in 1997. In 2002, he earned the Ph.D. Degree in physics from the Department of Physics "Michelangelo Merlin", the University of Bari, where he also completed his postdoctoral studies. He is currently qualified at the Italian Minist
  • 466
  • 23 Aug 2022
Topic Review
ASTER (Spacecraft)
ASTER is a planned space mission under development by the Brazilian Space Agency that will launch a spacecraft to orbit a near-Earth object known as (153591) 2001 SN263, a triple asteroid system. The launch is scheduled for 2025, with a rendezvous in 2024/2027. According to de Brum et al. 2021, the launch is planned for June 2022 (asteroid arrival in December 2024) or June 2025 (arrival September 2027).
  • 466
  • 15 Nov 2022
Topic Review
SMC AB8
AB8, also known as SMC WR8, is a binary star in the Small Magellanic Cloud (SMC). A Wolf-Rayet star and a main sequence companion of spectral type O orbit in a period of 16.638 days. It is one of only nine known WO stars, the only Wolf-Rayet star in the SMC not on the nitrogen sequence, and the only Wolf-Rayet star in the SMC outside the main bar.
  • 465
  • 26 Oct 2022
Topic Review
Dorado
Dorado, Latin for "the swordfish," is a constellation in the southern sky, first introduced by Dutch navigators in the late 16th century. Situated near the South Celestial Pole, Dorado is renowned for hosting the Large Magellanic Cloud, a satellite galaxy of our Milky Way, and several notable deep-sky objects, including the Tarantula Nebula. Its prominence in the southern hemisphere makes it a significant feature in celestial navigation and astronomical observation.
  • 463
  • 08 Mar 2024
Topic Review
Soyuz 5
Soyuz 5 (Russian: Союз 5, Union 5) was a Soyuz mission using the Soyuz 7K-OK spacecraft launched by the Soviet Union on 15 January 1969, which docked with Soyuz 4 in orbit. It was the first docking of two crewed spacecraft of any nation, and the first transfer of crew from one space vehicle to another of any nation, the only time a transfer was accomplished with a space walk – two months before the United States Apollo 9 mission performed the first internal crew transfer. The mission, flown by cosmonauts Boris Volynov, Aleksei Yeliseyev, and Yevgeny Khrunov, was also memorable for its dramatic re-entry. The craft's service module did not separate, so it entered the atmosphere nose-first, leaving Volynov hanging by his restraining straps. As the craft aerobraked, the atmosphere burned through the service module, allowing the remaining descent module to right itself before the escape hatch was burned through. During the descent, the parachute lines tangled and the landing rockets failed, resulting in a hard landing that broke Volynov's teeth.
  • 460
  • 03 Nov 2022
Topic Review
Delphinus
Delphinus, commonly known as the Dolphin, is a small but recognizable constellation in the northern celestial hemisphere. Its distinctive shape resembles a leaping dolphin, making it a charming sight in the night sky.  It is one of the 48 constellations listed by Ptolemy, and one of the 88 modern constellations recognized by the International Astronomical Union (IAU).
  • 458
  • 08 Mar 2024
Topic Review
Norma
Norma, Latin for "the square," is a small southern constellation located in the Milky Way. Despite its diminutive size and lack of bright stars, it remains one of the 88 modern constellations recognized by the International Astronomical Union (IAU).
  • 458
  • 15 Mar 2024
Topic Review
Lupus
Lupus, the Latin word for "wolf," is a constellation located in the southern celestial hemisphere. Representing a wolf, it was one of the 48 constellations listed by Ptolemy, and is one of the 88 modern constellations recognized by the International Astronomical Union.
  • 455
  • 15 Mar 2024
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