Personal computing power of neighboring planet
1. Address
the address of bitcoin world looks like this
the address itself is just a string of codes, just like your bank account number 3210000003288372, which is used to mark an account
everyone can have countless addresses
the address is public
2. Bitcoin records
how much money there is in the bank account is recorded by the bank
the amount of money in the bitcoin address is recorded by the whole bitcoin network. Each complete bitcoin data will record how many bitcoins are stored in this address
each node participating in the bitcoin network can save a complete of bitcoin data, and everyone has a backup on hand to prevent counterfeiting
3. Key (private key)
the key is another string of characters that you only know. The key is used to operate the money in the bitcoin address
key and address are the relationship between a key and a lock. Each address has only one password, and each password also operates a bitcoin address
with the key, you can control the money in the bitcoin address and pay to anyone
the key should be absolutely secure. The lost or deleted key can never be retrieved, and the money in the corresponding bitcoin address can never be used
the key needs to be kept secret. Anyone who knows the key can steal all your bitcoin
4. Wallet
the transaction process of bitcoin involves a lot of complex calculations. In order to simplify the operation, we have made wallets
the wallet has client software on the computer and online web version
the function of the wallet is to pay with one click, and the complicated calculation behind it is left to the wallet
since you have to pay, the wallet must know your key, so another important function of the wallet is to protect the key
if it is a client software, the key is saved in a directory set by the software (not encrypted). If it is an online web version, the key is stored in the background of the website
sometimes you hear about "paper wallet" or "brain wallet". Paper wallet means to print your key on a piece of paper and delete the key record completely from the computer. Brain wallet is to change a word that you can easily remember into a key, which is easy to remember. Both paper wallets and brain wallets are ways to protect keys
5. Security
if the computer client software is used, multibit or bitcoin QT is recommended. Both are official software recommendations for the bitcoin community. The installation of these two softwares must be downloaded directly from the official website, and the check code must be checked before and after downloading. This is to prevent someone from tampering with wallet software and stealing keys
using the client software as the wallet, the key is stored in the computer, so the security of the computer is also very important
if you use a paper wallet, make sure the paper is not lost
brain wallet is not recommended<
6. mining
about every 10 minutes, some new bitcoin will appear in the bitcoin network, which can be imagined as the sky throwing money
whose pocket does the money fall into depends on whose computer is fast. The faster you calculate, the more likely you are to find the money
mining is to use the computer to calculate and collect the money
ordinary home computers are too slow, and they have already quit the mining instry< The miner is commonly known as a miner.
blood donation can be made after the initial examination<
after blood collection in the blood donation car or blood donation house, they are sent to the laboratory of the blood station at 5 or 6 p.m. (the test items include blood type, hemoglobin, transaminase, hepatitis B, hepatitis C, AIDS and syphilis) and are generally tested in the evening of the same day
most of the blood is OK, and the results will be available the next day. The blood in question will give results in the third day
according to our experience, those who are qualified after blood donation will be informed by SMS the next day at the fastest and one week at the slowest
if there is a problem with the blood, the blood donor will be informed by phone
after three days, you can call to inquire, and almost all of them will get results. You can also inquire at any blood donation point in the city with your ID card or blood donation card. The system is connected to the Internet.
legal representative: Li Guoping
time of establishment: October 17, 2014
registered capital: RMB 1.08 million
Instrial and commercial registration number: 420111000363384
enterprise type: limited liability company (invested or controlled by natural person)
address: room 18, 20 / F, building A3, Wuhan Nanguo Xiongchu Plaza boutique life hall, intersection of Xiongchu street and Luoshi South Road, Hongshan District
Hello, everyone. I'm mianyanmayu, and I'll share different wonderful information with you every day
today, we will discuss how to distinguish whether the high bamboo shoots are bad, and what is the harm of eating high bamboo shoots with black spots
let's talk about it in detail
the small red star in the center of the image above is the neighboring star. It is so dim that it was not discovered in South Africa by Robert Innes, then director of the union Observatory in Johannesburg, until 1915. All kinds of stars in our galaxy can be seen in the background of the image. The brightest star in the Nanmen II system, whose characteristics are very similar to our sun, is also the third brightest star in the earth's night sky
parallax measured by Hipparcos is 772.33 ± According to the 2.42 milliarcseconds calculation, the distance between the nearest star and the earth is about 4.22 light years, or 270000 astronomical units (1 astronomical unit is about 150 million kilometers, which is the average distance between the earth and the sun). Its nearest neighbors are: Centaurus α The other two stars of triad (0.21 light years), the sun and Barnard (6.55 light years). From earth observation, the nearest star is far from Centaurus α The angle of view of star a is about 2 °， Or four times the diameter of the full moon. Because the nearest star is far from Centaurus α The ratio of the binary star AB to the sun is only one in 20, and astronomers speculate that it may be orbiting Centaurus in a period of 500000 to 2000000 years or more α Star AB runs in an orbit of two stars. Therefore, neighboring star is also known as Centaurus α Star C
using the very large telescope (VLT) of ESO in Chile, the angular diameter of the neighboring star was 1.02 in 2002 ± 0.08 MAS. Given its distance, it is estimated that its actual diameter is about one seventh of that of the sun, or 1.5 times that of Jupiter. It's about one eighth the mass of the sun, or 150 times the mass of Jupiter.
Proxima Centauri is the constellation Centauri α The third star of triad, also known as Centaurus according to Bayer nomenclature α Star C. It is the closest star to the solar system (4.22 light-years). It was discovered in South Africa in 1915 by astronomer Robert Innes, who was the director of the union Observatory in Johannesburg
light years is very small from the scale of the universe, but it is very far away for human beings. So far, the space probe made by human beings has not traveled light years
however, at present, the fastest aircraft launched by human is not navigator 1. The laurel CY belongs to the Juno detector, and its speed has reached 264000 km / h, which means it can fly more than 73 km / s, much faster than Voyager 1. However, even at this speed, it will take 4100 light years to complete, and it will take more than 17300 years to fly near the neighboring star
objectively speaking, with the current human science and technology, considering the life span of fuel and spacecraft, it is impossible to reach a planet one light year away, and it is even more difficult to fly to Mars with only 0.37 astronomical units. Therefore, this problem can only be used for divergent thinking of astronomy and aerospace enthusiasts, and has no practical significance in reality< br />
Luminosity
generally, the luminosity of red dwarfs is very weak, which is invisible to the naked eye, and neighboring stars are no exception. It has an apparent magnitude of 11 and an absolute magnitude of 15.5. From Centaurus α The other two observation stars of triad will be 4.5
distance, diameter and mass
parallax 772.33 measured by Hipparcos ± According to the 2.42 milliarcseconds calculation, the distance between the nearest star and the earth is about 4.22 light years, or 270000 astronomical units (1 astronomical unit is about 150 million kilometers, which is the average distance between the earth and the sun). The nearest neighbor star to the earth is 40 trillion kilometers away from the earth, and the light from the neighbor star can reach the earth in about 4.3 years. Its nearest neighbors are: Centaurus α The other two stars of triad (0.21 light years), the sun and Barnard (6.55 light years). From earth observation, the nearest star is far from Centaurus α The angle of view of star a is about 2 °， Or four times the diameter of the full moon. Because the nearest star is far from Centaurus α The ratio of the binary star AB to the sun is only one in 20, and astronomers speculate that it may be orbiting Centaurus in a period of 500000 to 2000000 years or more α Star AB runs in an orbit of two stars. Therefore, neighboring star is also known as Centaurus α Star C. Using the very large telescope (VLT) of ESO in Chile in 2002, the angular diameter of the neighboring star is 1.02 ± 0.08 MAS. Given its distance, it is estimated that its actual diameter is about one seventh of that of the sun, or 1.5 times that of Jupiter. It's about one eighth the mass of the sun, or 150 times the mass of Jupiter
formation age and lifetime
the formation age of neighboring star and Centaurus α Stars a and B are the same, about 4.85 billion years ago, slightly earlier than the sun's 4.6 billion years ago. However, the size of the star is only slightly larger than the critical mass of the star needed to proce the hydrogen fusion reaction, and the fusion reaction rate is very slow and unstable, so astronomers estimate that its life span can reach more than 10 billion years