You're using an outdated browser. Please upgrade to a modern browser for the best experience.
Subject:
All Disciplines Arts & Humanities Biology & Life Sciences Business & Economics Chemistry & Materials Science Computer Science & Mathematics Engineering Environmental & Earth Sciences Medicine & Pharmacology Physical Sciences Public Health & Healthcare Social Sciences
Sort by:
Most Viewed Latest Alphabetical (A-Z) Alphabetical (Z-A)
Filter:
All Topic Review Biography Peer Reviewed Entry Video Entry
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
  • 861
  • 23 Aug 2022
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. 
  • 839
  • 11 Dec 2023
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.
  • 837
  • 18 Sep 2023
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.
  • 826
  • 30 Sep 2022
Topic Review
The Evolution of Ryugu
The asteroid 1999 JU3, which would later be named Ryugu, was classified as a Cg-type asteroid in 2001, based on its strong UV absorption feature shortward of 0.55 um and its flat to slightly reddish slope longward of 0.55 um. Cg-type asteroids are part of the C-complex of asteroids, which were suggested to be “primitive” in nature and potentially the parent bodies for carbonaceous chondrites. The linking of carbonaceous chondrites and C-complex asteroids relates to several interpretations concerning features in the near infrared spectra of C-complex asteroids. The features were interpreted as arising from secondary alteration minerals, including goethite, hematite, jarosite and phyllosilicates, that are the products of aqueous alteration and which are found in carbonaceous chondrites.
  • 806
  • 18 Jul 2023
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.
  • 792
  • 24 Aug 2023
Topic Review
Astrobiology Science and Technology for Exploring Planets
Astrobiology Science and Technology for Exploring Planets (ASTEP) was a program established by NASA to sponsor research projects that advance the technology and techniques used in planetary exploration. The objective was to enable the study of astrobiology and to aid the planning of extraterrestrial exploration missions while prioritizing science, technology, and field campaigns.
  • 786
  • 06 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).
  • 782
  • 10 Oct 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.
  • 777
  • 29 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.
  • 770
  • 26 Oct 2022
Topic Review
Soyuz TM-21
Soyuz TM-21 was a crewed Soyuz spaceflight to Mir. The mission launched from Baikonur Cosmodrome, atop a Soyuz-U2 carrier rocket, at 06:11:34 UTC on March 14, 1995. The flight marked the first time thirteen humans were flying in space simultaneously, with three aboard the Soyuz, three aboard Mir and seven aboard Space Shuttle Endeavour, flying STS-67. The spacecraft carried expedition EO-18 to the space station. This included the first American astronaut to launch on a Soyuz spacecraft and board Mir, Norman Thagard, for the American Thagard Increment aboard the station, which was the first Increment of the Shuttle-Mir program. The three crew members it launched were relieved by Space Shuttle Atlantis during STS-71, when they were replaced by expedition EO-19. The crew returned to earth aboard Soyuz TM-21 on September 11, 1995.
  • 766
  • 16 Nov 2022
Topic Review
Black Holes and Quantum Mechanics
Mass and spin distributions of stellar mass black holes (BH) are important sources of information on the formation mechanism and the evolution of galaxies. The birth of a stellar-mass BH, ranging in the interval ~5–150 M⊙, is due to the spectacular phase of a massive star’s core collapse, an event involving the emission of multi-messenger signals such as neutrinos, GW’s and electromagnetic radiation in several bands.
  • 765
  • 03 Nov 2022
Topic Review
JPL Mars Helicopter Scout
The Mars Helicopter Scout (MHS) is a planned robotic helicopter that will test the technology to scout interesting targets for study on Mars, and help plan the best driving route for future Mars rovers. The small drone helicopter will be deployed in 2021 from the planned Mars 2020 rover. It is expected to fly up to five times during its 30-day test campaign, early in the rover's mission, as it is primarily a technology demonstration. Each flight will take no more than 3 minutes, at altitudes ranging from 3 m to 10 m above the ground, but it could potentially cover a maximum distance of about 600 m (2,000 ft) per flight. It will use autonomous control and communicate with the Mars 2020 rover directly after each landing. If it works as expected, NASA will be able to build on the design for future Mars missions. MiMi Aung is the project lead. Other team members are AeroVironment Inc., NASA Ames Research Center, and NASA Langley Research Center.
  • 759
  • 24 Nov 2022
Topic Review
Corona Australis
Corona Australis, Latin for "Southern Crown," is a small constellation in the southern celestial hemisphere. Situated near the celestial equator, it represents a crown or wreath and is associated with various mythological interpretations across different cultures. Despite its modest size, Corona Australis contains several interesting celestial objects.
  • 743
  • 08 Mar 2024
Topic Review
Maintainance of the International Space Station
Since construction started, the International Space Station programme has had to deal with several maintenance issues, unexpected problems and failures. These incidents have affected the assembly timeline, led to periods of reduced capabilities of the station and in some cases could have forced the crew to abandon the space station for safety reasons, had these problems not been resolved.
  • 742
  • 18 Oct 2022
Topic Review
Apus
Apus is a southern celestial constellation first introduced by the International Astronomical Union (IAU) in the early 20th century. Its name, derived from the Greek word for "bird of paradise," symbolizes a bird-like creature, though it does not represent any specific bird species. Positioned in the southern sky, Apus is notable for its lack of bright stars, making it a challenge for observers in light-polluted areas but a rewarding sight under pristine conditions for those exploring the southern heavens.
  • 726
  • 29 Feb 2024
Topic Review
List of Unnumbered Minor Planets: 2002 T–Y
This is a partial list of unnumbered minor planets for principal designations assigned between 1 October 2002 and 31 December 2002 (T–Y).
  • 726
  • 10 Nov 2022
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.
  • 717
  • 15 Nov 2022
Topic Review
July 16: Apollo 11 Launched
Apollo 11 was the first manned spaceflight to land humans on the Moon, marking a historic milestone in space exploration. Launched on July 16, 1969, from Kennedy Space Center in Florida, it was the fifth crewed mission of NASA's Apollo program. The mission was crewed by Commander Neil A. Armstrong, Lunar Module Pilot Edwin "Buzz" Aldrin, and Command Module Pilot Michael Collins. The successful Moon landing and return to Earth fulfilled President John F. Kennedy’s 1961 goal of sending an American safely to the Moon before the decade's end.
  • 714
  • 16 Jul 2025
Topic Review
List of Unnumbered Minor Planets: 2003 U–Y
This is a partial list of unnumbered minor planets for principal designations assigned between 16 October 2003 and 31 December 2003 (U–Y).
  • 700
  • 24 Nov 2022
  • Page
  • of
  • 13
Featured Entry Collections
>>

Featured Books

>>
Encyclopedia of COVID-19
Encyclopedia of Engineering
Encyclopedia of Social Sciences
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Academic Video Service
Feedback