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1 天前 · Voyager 1. For other uses, see Voyager 1 (disambiguation). Heliocentric positions of the five interstellar probes (squares) and other bodies (circles) until 2020, with launch and flyby dates. Markers denote positions on 1 January of each year, with every fifth year labelled. Plot 1 is viewed from the north ecliptic pole, to scale.
1 天前 · Andromeda Galaxy. The Andromeda Galaxy is a barred spiral galaxy and is the nearest major galaxy to the Milky Way. It was originally named the Andromeda Nebula and is cataloged as Messier 31, M31, and NGC 224.
1 天前 · The Shinkansen ( Japanese: 新幹線, [ɕiŋkaꜜɰ̃seɴ] ⓘ, lit. 'new main line'), colloquially known in English as the bullet train, is a network of high-speed railway lines in Japan. Initially, it was built to connect distant Japanese regions with Tokyo, the capital, to aid economic growth and development.
5 天前 · The Global Positioning System ( GPS ), originally Navstar GPS, [2] is a satellite-based radio navigation system owned by the United States government and operated by the United States Space Force. [3] .
3 天前 · Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages.Numbers are written with combinations of letters from the Latin alphabet, each letter with a fixed integer value., each letter with a fixed integer value.
3 天前 · Example graph of a logistic regression curve fitted to data. The curve shows the estimated probability of passing an exam (binary dependent variable) versus hours studying (scalar independent variable). See Example for worked details. In statistics, the logistic model (or logit model) is a statistical model that models the log-odds of an event as a linear combination of one or more independent ...
1 天前 · Lupus, technically known as systemic lupus erythematosus ( SLE ), is an autoimmune disease in which the body's immune system mistakenly attacks healthy tissue in many parts of the body. [1] . Symptoms vary among people and may be mild to severe. [1] .
