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Topic Review
Eridanus
Eridanus, the constellation named after the ancient Greek river god, is a sprawling celestial feature stretching across the southern sky. It is the sixth largest of the 88 modern constellations, rich in diverse astronomical treasures.
  • 539
  • 15 Mar 2024
Topic Review
Kepler-86
Kepler-86, PH2 or KIC 12735740 (2MASS 19190326+5157453), is a G-type star 1,130 ly (350 pc) distant within the constellation Cygnus. Roughly the size and temperature of the Sun, PH2 gained prominence when it was known to be the host of one of 42 planet candidates detected by the Planet Hunters citizen science project in its second data release. The candidate orbiting around PH2, known as PH2 b, had been determined to have a spurious detection probability of only 0.08%, thus effectively confirming its existence as a planet. Located in its parent star's habitable zone, PH2 b (or Kepler-86b) is a "Jupiter-size" gas giant which may have a natural satellite suitable for hosting life. The report of the confirmed detection of PH2 b was submitted on January 3, 2013. It was discovered by amateur Pole Rafał Herszkowicz using his laptop and access to the Internet project with data from the Kepler space observatory.
  • 536
  • 24 Oct 2022
Topic Review
Corona Borealis
Corona Borealis, Latin for "Northern Crown," is a constellation in the northern celestial hemisphere, known for its distinctive semicircular shape resembling a crown. Its counterpart in the southern hemisphere, Corona Australis, shares a similar name and mythological association with crowns but lies on the opposite side of the celestial sphere. 
  • 536
  • 08 Mar 2024
Biography
Jules Aarons
Jules Aarons (October 3, 1921 – November 21, 2008) was an American space physicist known for his study of radio-wave propagation, and a photographer known for his street photography in Boston. Aarons was born in the Bronx, NY, where his father worked in the garment industry. He graduated from the City College of New York in 1942. During World War II he served in the Army Signal Corps. He st
  • 534
  • 14 Nov 2022
Topic Review
AT2018cow
Coordinates: 16h 16m 00.2242 s, +22° 16′ 04.890 ″ AT2018cow (ATLAS name: ATLAS18qqn; also known as Supernova 2018cow, SN 2018cow, and "The Cow") was a very powerful astronomical explosion, 10 – 100 times brighter than a normal supernova, spatially coincident with galaxy CGCG 137-068, approximately 200 million ly (60 million pc) distant in the Hercules constellation. It was first detected on 16 June 2018 by the ATLAS-HKO telescope, and had generated significant interest among astronomers throughout the world. Later, on 10 July 2018, and after AT2018cow had significantly faded, astronomers, based on followup studies with the Nordic Optical Telescope (NOT), formally described AT2018cow as SN 2018cow, a type Ib supernova, showing an "unprecedented spectrum for a supernova of this class"; although others, mostly at first but also more recently, have referred to it as a type Ic-BL supernova. An explanation to help better understand the unique features of AT2018cow has been presented.
  • 533
  • 19 Oct 2022
Topic Review
Hydra
Hydra, known as the Water Snake, is a prominent constellation located in the southern celestial hemisphere. It is the largest of the 88 modern constellations in terms of area and is best observed from the Southern Hemisphere during the months of February and March. 
  • 533
  • 15 Mar 2024
Topic Review
Ara
Ara is a constellation in the southern celestial hemisphere. The name "Ara" originates from Greek mythology, where it represents the altar used by the gods in their divine ceremonies.
  • 523
  • 29 Feb 2024
Topic Review
2020 AV2
2020 AV2 is a near-Earth asteroid discovered by the Zwicky Transient Facility on 4 January 2020. It is the first asteroid discovered to have an orbit completely within Venus's orbit, and is thus the first and only known member of the inner-Venusian Vatira population of Atira-class asteroids. 2020 AV2 has the smallest known aphelion and third-smallest known semi-major axis among all asteroids. With an absolute magnitude around 16.4, the asteroid is expected to be larger than 1 km in diameter.
  • 522
  • 25 Nov 2022
Topic Review
Crux
Crux, commonly known as the Southern Cross, is a small but distinctive constellation located in the southern celestial hemisphere. Recognized for its iconic shape resembling a cross, Crux holds cultural significance across various civilizations and is one of the most recognizable asterisms in the night sky. Positioned close to the South Celestial Pole, Crux serves as a navigational aid for travelers in the southern hemisphere and has been used for centuries by sailors and explorers to determine directions.
  • 522
  • 08 Mar 2024
Topic Review
Transit of Venus, 2012
The 2012 transit of Venus, when the planet Venus appeared as a small, dark spot passing across the face of the Sun, began at 22:09 UTC on 5 June 2012, and finished at 04:49 UTC on 6 June. Depending on the position of the observer, the exact times varied by up to ±7 minutes. Transits of Venus are among the rarest of predictable celestial phenomena and occur in pairs. Consecutive transits per pair are spaced 8 years apart, and consecutive pairs occur more than a century apart: The previous transit of Venus took place on 8 June 2004 (preceded by transits on 9 December 1874 and 6 December 1882); the next pair of transits will occur on 10–11 December 2117 and in December 2125.
  • 518
  • 28 Nov 2022
Topic Review
Role of Gamma Ray Pulsars for MACE Telescope
Rapidly rotating neutron stars with very strong surface magnetic fields are observed to emit pulsed emission in the whole range of electromagnetic spectrum from radio to high-energy gamma rays. These so-called pulsars are known for their exceptional rotational stability. The radio emission from pulsars is generally believed to be powered by the rotational energy of neutron stars. More than 3000 pulsars have been currently known from radio observations; however, only about 10% are observed in the high-energy gamma ray band. The Fermi-LAT observations in the energy range above 100 MeV have discovered more than 300 pulsars. However, the origin of high-energy non-thermal radiation from pulsars is not completely understood and remains an active area of research. Researchers report a summary of observational features of the gamma ray pulsars and briefly discuss observability for the MACE gamma ray telescope, which has just started its regular science operation at Hanle in India. Six gamma ray pulsars, other than the well-known Crab and Geminga, are identified as probable candidates for MACE observations.
  • 518
  • 24 Aug 2023
Topic Review
Ursa Minor
Ursa Minor, Latin for "Lesser Bear," is a constellation in the northern celestial hemisphere. It is best known for containing the North Star, Polaris, which marks the position of the north celestial pole and aids in navigation. Despite its small size and dim stars, Ursa Minor holds significant cultural and navigational importance throughout human history.
  • 517
  • 15 Mar 2024
Topic Review
Large UV Optical Infrared Surveyor
The Large UV Optical Infrared Surveyor (LUVOIR) is a multi-wavelength space observatory concept being developed by the Goddard Space Flight Center and proposed for the Decadal Survey Concept Study started in January 2016. The concept is based on a mirror from 8 m to 18 m in diameter, and covering the ultraviolet, visible and infrared wavelengths. It would be a Large Strategic Science Mission and be up for selection sometime after 2020. LUVOIR is a set of goals and requirements for a space telescope, but is not a specific design. More concrete proposals have their own names, such as ATLAST and HDST. One of those will be selected to become LUVOIR.
  • 508
  • 23 Nov 2022
Topic Review
SDSS J1416+1348
Coordinates: 14h 16m 24.08s, +13° 48′ 26.7″ SDSS J1416+1348 (full designation is SDSS J141624.08+134826.7) is a nearby wide binary system of two brown dwarfs, located in constellation Boötes. The system consists of L-type component A and T-type component B.
  • 508
  • 29 Nov 2022
Biography
Padma Kant Shukla
Padma Kant Shukla (CorrFRSE, FInstP, FAPS, AFTWAS) (7 July 1950 – 26 January 2013) was a Distinguished Professor and first International Chair of the Physics and Astronomy Department of Ruhr-University Bochum (RUB) in Germany.[1] He was also the Director of the International Centre for Advanced Studies in Physical Sciences at RUB. He held a Ph.D. in Physics from Banaras Hindu University (BHU)
  • 504
  • 30 Nov 2022
Topic Review
Grus
Grus, the crane, is a constellation in the southern celestial hemisphere. Named after the crane bird in Greek mythology, it is one of twelve constellations conceived by the Dutch astronomer Petrus Plancius.
  • 499
  • 15 Mar 2024
Topic Review
Advanced Telescope for High Energy Astrophysics
Advanced Telescope for High-ENergy Astrophysics (Athena) is an X-ray observatory mission selected by European Space Agency (ESA) within its Cosmic Vision program to address the Hot and Energetic Universe scientific theme. Athena will operate in the energy range of 0.2–12 keV and will offer spectroscopic and imaging capabilities exceeding those of currently operating X-ray astronomy satellites – e.g. the Chandra X-ray Observatory and XMM-Newton – by at least one order of magnitude on several parameter spaces simultaneously.
  • 497
  • 30 Sep 2022
Topic Review
Gemini
Gemini, named after the Latin word for "twins," is a prominent constellation in the northern celestial hemisphere. Representing the twins Castor and Pollux from Greek mythology, Gemini is known for its two bright stars that mark the heads of the twins. 
  • 494
  • 15 Mar 2024
Topic Review
Light Curve Classification
Light curves are plots of brightness measured over time. In the field of Space Situational Awareness (SSA), light curves of Resident Space Objects (RSOs) can be utilized to infer information about an RSO such as the type of object, its attitude, and its shape.
  • 491
  • 18 Sep 2023
Topic Review
Auriga
Auriga, an IAU-recognized constellation, lies in the northern celestial hemisphere. Notable for its pentagonal shape, it encompasses several bright stars, including Capella. This constellation is visible during winter and contains various deep-sky objects like star clusters and nebulae.
  • 491
  • 29 Feb 2024
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