|
Genesis I
''Genesis I'' is an experimental space habitat designed and built by the private American firm Bigelow Aerospace and launched in 2006. It was the first module to be sent into orbit by the company, and tested various systems, materials and techniques related to determining the viability of long-term inflatable space structures through 2008. Such structures, including this module and others built by Bigelow Aerospace, were similar to the 1990s NASA expandable TransHab design, which aimed to provide increased interior volume at a reduced launch diameter and potentially reduced mass compared to traditional rigid structures. The on-board systems transmitted data for 2.5 years. The spacecraft remains in orbit, allowing researchers to continue to monitor the long-term viability of its expandable space structure. Spacecraft history ''Genesis I'' was launched on 12 July 2006 at 14:53:36 UTC aboard an ISC Kosmotras Dnepr launch vehicle, launched from Dombarovsky missile base nea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genesis II (space Habitat)
''Genesis II'' is the second experimental space habitat designed and built by the private American firm Bigelow Aerospace, launched in 2007. As the second module sent into orbit by the company, this spacecraft builds on the data and experience gleaned from its previously orbited sister-ship ''Genesis I''. Like its sister-ship and other modules being designed by Bigelow Aerospace, this spacecraft is based on the NASA TransHab design, which provides increased interior volume and reduced launch diameter along with potentially reduced mass compared to traditional rigid structures. ''Genesis II'' was "retired" when its avionics systems stopped working after two and a half years, thus becoming a derelict spacecraft. , the spacecraft remains in orbit. Spacecraft history Similar to the process endured by Bigelow for ''Genesis I'', transporting ''Genesis II'' to Russia for launch was the end result of nearly a year of regulatory processes due to restrictions imposed by Interna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bigelow Aerospace
Bigelow Aerospace is an American aeronautics and outer space technology company which manufactures and develops expandable space station modules. Bigelow Aerospace was founded by Robert Bigelow in 1998, and is based in North Las Vegas, Nevada. It is funded in large part by the profit Bigelow gained through his ownership of the hotel chain, Budget Suites of America. By 2013, Bigelow had invested US$250 million in the company. Bigelow stated on a number of occasions that he was prepared to fund Bigelow Aerospace with about US$500 million through 2015 in order to achieve launch of full-scale hardware. Bigelow Aerospace announced in 2010 that they intended to create a modular set of space habitats for creating or expanding space stations but despite many concepts and models, never completed a working space station beyond two small prototypes that flew in 2006 and 2007. In March 2020, the company laid off all 88 of its employees due to the COVID-19 pandemic, and planned to rehir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geomagnetic Storm
A geomagnetic storm, also known as a magnetic storm, is a temporary disturbance of the Earth's magnetosphere caused by a solar wind shock wave and/or cloud of magnetic field that interacts with the Earth's magnetic field. The disturbance that drives the magnetic storm may be a solar coronal mass ejection (CME) or (much less severely) a co-rotating interaction region (CIR), a high-speed stream of solar wind originating from a coronal hole. The frequency of geomagnetic storms increases and decreases with the sunspot cycle. During solar maximum, geomagnetic storms occur more often, with the majority driven by CMEs. The increase in the solar wind pressure initially compresses the magnetosphere. The solar wind's magnetic field interacts with the Earth's magnetic field and transfers an increased energy into the magnetosphere. Both interactions cause an increase in plasma movement through the magnetosphere (driven by increased electric fields inside the magnetosphere) and an increase ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gene
In biology, the word gene (from , ; "... Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a basic unit of heredity and the molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protein-coding genes and noncoding genes. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. These genes make up different DNA sequences called genotypes. Genotypes along with environmental and developmental factors determine what the phenotypes will be. Most biological traits are under the influence of polygenes (many different genes) as well as g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small Satellite
A small satellite, miniaturized satellite, or smallsat is a satellite of low mass and size, usually under . While all such satellites can be referred to as "small", different classifications are used to categorize them based on mass. Satellites can be built small to reduce the large economic cost of launch vehicles and the costs associated with construction. Miniature satellites, especially in large numbers, may be more useful than fewer, larger ones for some purposes – for example, gathering of scientific data and radio relay. Technical challenges in the construction of small satellites may include the lack of sufficient power storage or of room for a propulsion system. Rationales One rationale for miniaturizing satellites is to reduce the cost; heavier satellites require larger rockets with greater thrust that also have greater cost to finance. In contrast, smaller and lighter satellites require smaller and cheaper launch vehicles and can sometimes be launched in mult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cydia Saltitans
''Cydia saltitans'' or jumping bean moth is a moth from Mexico that is most widely known as its larva, where it inhabits the carpels of seeds from several related shrubby trees, mainly ''Sebastiania pavoniana'' or ''Sapium biloculare'' (syn. '' Pleradenophora bilocularis''). These seeds are commonly known as Mexican jumping beans. The moth lays the egg on the young capsule. The hatched larva gnaws into the fruit, which closes the minute hole during its growth. The larva attaches itself to the capsule with many silken threads by hooks on its anal and four hind abdominal prolegs. When the fruit is warmed, for instance by being held in the palm of the hand, the larva twitches, pulling on the threads and causing the characteristic hop. "Jump" is often an exaggeration, but the beans nonetheless do move around quite a bit. The larva may live for months inside the fruit with periods of inactivity. It eats away the seed inside the capsule, making a hollow for itself. If the fruit is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexican Jumping Bean
Mexican jumping beans (also known as ' in Spanish) are seed pods that have been inhabited by the larva of a small moth ('' Cydia saltitans'') and are native to Mexico. The "bean" is usually tan to brown. They are from the shrub ''Sebastiania pavoniana'', often also referred to as "jumping bean". However, they are not related to actual beans ( legume plants), but rather to spurges. The beans are considered non-toxic but are not generally eaten. In the spring, when the shrub is flowering, moths lay their eggs on the shrub’s hanging seedpods. When the eggs hatch, tiny larvae bore into the immature green pods and begin to devour the seeds. The pods ripen, fall to the ground and separate into three smaller segments, and those segments are called Mexican jumping beans. As the tiny larvae inside curl up and uncurl, they hit the capsule’s wall with their heads – and the bean jumps. It’s been observed that they move more as temperatures rise, the larva eats away the inside of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madagascar Hissing Cockroach
The Madagascar hissing cockroach (''Gromphadorhina portentosa''), also known as the hissing cockroach or simply hisser, is one of the largest species of cockroach, reaching at maturity. They are native to the island of Madagascar, which is off the African mainland, where they are commonly found in rotting logs. It is one of some 20 known species of large hissing roaches from Madagascar, many of which are kept as pets, and often confused with one another by pet dealers; in particular, ''G. portentosa'' is commonly confused with '' G. oblongonota'' and '' G. picea''.Delfosse, E. (2004) Les blattes souffleuses de Madagascar. Insectes 153: 19-22. Unlike most cockroaches, they are wingless. They can reproduce asexually, but usually reproduce sexually. They are excellent climbers and can scale smooth glass. Males can be distinguished from females by their thicker, hairier antennae and the very pronounced "horns" on the pronotum. Females carry the ootheca internally, and release the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magnetometer
A magnetometer is a device that measures magnetic field or magnetic dipole moment. Different types of magnetometers measure the direction, strength, or relative change of a magnetic field at a particular location. A compass is one such device, one that measures the direction of an ambient magnetic field, in this case, the Earth's magnetic field. Other magnetometers measure the magnetic dipole moment of a magnetic material such as a ferromagnet, for example by recording the effect of this magnetic dipole on the induced current in a coil. The first magnetometer capable of measuring the absolute magnetic intensity at a point in space was invented by Carl Friedrich Gauss in 1833 and notable developments in the 19th century included the Hall effect, which is still widely used. Magnetometers are widely used for measuring the Earth's magnetic field, in geophysical surveys, to detect magnetic anomalies of various types, and to determine the dipole moment of magnetic materials. In an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Positioning System
The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite systems (GNSS) that provides geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephonic or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Attitude Control (spacecraft)
Spacecraft attitude control is the process of controlling the orientation of a spacecraft (vehicle/satellite) with respect to an inertial frame of reference or another entity such as the celestial sphere, certain fields, and nearby objects, etc. Controlling vehicle attitude requires sensors to measure vehicle orientation, actuators to apply the torques needed to orient the vehicle to a desired attitude, and algorithms to command the actuators based on (1) sensor measurements of the current attitude and (2) specification of a desired attitude. The integrated field that studies the combination of sensors, actuators and algorithms is called guidance, navigation and control (GNC). Overview A spacecraft's attitude must typically be stabilized and controlled for a variety of reasons. It is often needed so that the spacecraft high-gain antenna may be accurately pointed to Earth for communications, so that onboard experiments may accomplish precise pointing for accurate colle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volt
The volt (symbol: V) is the unit of electric potential, electric potential difference ( voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Definition One volt is defined as the electric potential between two points of a conducting wire when an electric current of one ampere dissipates one watt of power between those points. Equivalently, it is the potential difference between two points that will impart one joule of energy per coulomb of charge that passes through it. It can be expressed in terms of SI base units ( m, kg, s, and A) as : \text = \frac = \frac = \frac. It can also be expressed as amperes times ohms (current times resistance, Ohm's law), webers per second (magnetic flux per time), watts per ampere (power per current), or joules per coulomb (energy per charge), which is also equivalent to electronvolts per elementary charge: : \text = \text\Omeg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.JPG "Click for more on -> Cydia Saltitans")
