The lunar calendar is a lunisolar calendar.
The brightest star in the night sky is not Polaris (for related discussion, see: What is the brightest star in the night sky?).
The star closest to the earth is the sun, and the star closest to the sun is Proxima Centauri.
There are eighty-eight constellations in the sky, and the ecliptic spans thirteen of them. (Added Ophiuchus)
Virgo: Virgo → Virgo, Sagittarius: Sagittarius → Sagittarius, Aquarius: Aquarius → Aquarius (the latter is the standard name); Libra: Libra (cheng4). (The standard I am talking about is this: astronomical terms)
You don’t need a telescope to recognize the constellations or watch the meteor shower.
There are shooting stars every night.
Ordinary people should choose to watch the "Zenith Meteor Hourly Number" (ZHR) meteor shower (candidate list includes: Quadrantids in January, Perseids in August, Geminids in December Meteor shower Geminids). Attached is the meteor shower calendar: Meteor Shower Calendar
The morning star and Chang Geng star both refer to Venus.
Do not use telescopes to directly observe the sun, otherwise the legendary "my titanium alloy dog ??eyes will be blinded" will become a reality.
"You cried and told me that the photos are all lies." The brilliant effect of nebulae in astronomical photos cannot be seen with the naked eye. (For related discussion, see: Are the brilliant nebulae in astronomical photos visible directly to the naked eye or are they the effects of camera photography?)
"How far can a telescope see?" is not a correct way to ask a question. (For related discussions, see: How far can the most advanced astronomical telescopes observe, and how are astronomical telescopes classified?)
The first quarter moon appears in the western sky in the first half of the night, and the waning moon appears in the eastern sky in the second half of the night, referred to as " Up to the west, down to the east."
Constellations are two-dimensional projections of distant celestial bodies. (For related discussion, see: Are celestial bodies in the same constellation really relatively close in space, or are they just relatively close in the projection of the earth's field of view?)
The "big moon" effect in the photo is OK Photographed. (For related discussion, see: Why is the moon in photography much larger than what is seen with the naked eye?)
Almost all stars visible to the human eye are located in the Milky Way. (For related discussions, see: On Earth, are all the stars visible to the naked eye in the Milky Way?)
The "red moon" and "blood moon" that appear during a total lunar eclipse are masterpieces of the earth's atmosphere. (For related discussions, see: What is the cause of the formation of the "red moon" during a total lunar eclipse?)
The solar system is much more empty than we imagine. (For related discussions, see: In the space laboratory, is it realistic to simulate the solar system and build a completely scaled-down mini solar system?)
The orbital radii of the eight planets can be memorized with the help of the Titius-Bode rule . (Wikipedia: Tidius-Bode's Rule)
A solar term is a moment.
The reason the moon always faces the Earth is that it is tidally locked. (For related discussions, see: Why does one side of the moon always face the earth? Is it too much of a coincidence that one side of the moon always faces the earth?)
The reason for the formation of the moon phases is that the moon revolves around the earth, not the earth. Blocked the sun's rays. (For related discussions, see: The moon waxes and wanes. Why is the moon sometimes concave, sometimes convex, and sometimes just a semicircle?)
The prototype of the default wallpaper of OS X Mountain Lion is NGC 3190. (APOD: 2010 May 3)
"Look northwest and shoot at the Sirius" Su Shi wrote correctly. (For related discussions, see: Sirius and those who insulted Su Shi)
The "bullfighting" that appears in ancient poetry mostly refers to the Dipper and the Ox rather than the Big Dipper and the Morning Ox.
The stars rise about 4 minutes earlier each day than they did the day before.
The moon rises about 50 minutes later each day than the day before.
We cannot see Scorpius and Orion at the same time in the Northern Hemisphere. (For related discussions, see: "If you don't meet each other in life, everything is like participating in business." Which two stars are "Participation" and "Shang"?)
Jupiter's Great Red Spot can fit 2-3 Earth.
(It seems to have shrunk now)
Sunspots are darker than the surrounding normal solar photosphere, so they appear "black".
Most constellations are not very impressive.
Due to the influence of precession, the "Polaris" will change on the time scale of "thousands of years":
Meteor showers are mostly debris left in the orbit of comets falling to the earth formed by the atmosphere.
The standard for meteor storms is the "zenith meteor rate per hour" (ZHR). Under ideal conditions, there will be a meteor every 3 to 4 seconds. You can feel it.
Because it is too small, the sun will not eventually turn into a black hole. (For related discussion, see: Will the Sun Become a Black Hole?)
Light-year is a unit of length.
On a clear night, you can still see stars even in big cities.
In astronomy, "magnitude" is used to describe the brightness or darkness of celestial bodies. The lower the magnitude value, the brighter the object.
The magnification of a telescope is not necessarily better.
The default orientation in astronomy is "up north, down south, left east, right west".
Currently, academic circles believe that the universe has no boundaries. (For related discussions, see: Is the universe infinite? Does the universe have boundaries? Does our world have a center? Is the universe infinite? What is outside the infinite universe?)
Solar Eclipse It must happen on the first day of the new lunar month, usually on the first day of the lunar month.
A lunar eclipse must occur in sight, usually on the 15th.
Please correctly distinguish between "sidereal day view" (i.e. "star trail") and "meteor shower".
The eight planets are basically located on the same plane (ecliptic plane).
Meteor showers are cyclical. (For related discussion, see: Are meteor showers periodic? If so, what is the principle?)
The total mass of the asteroid belt is very small. (For related discussions, see: Assuming enough time and energy, is it possible for humans to reunite the stars in the asteroid belt into a large planet?)
"We who come from the stars" in addition to hydrogen, the human body is composed of All elements are synthesized from stars. (Science Squirrel Club: Why is the title "My Love from the Star" so interesting?)
The so-called "planetary retrograde" is just the earth being overtaken by the inner planet or the earth overtaking the outer planet. It's just an illusion caused by the car.
The "fire" in "July Fire" refers to the "big fire" Antares, not Mars.
"Ying Huo Shou Xin" refers to the phenomenon of Mars going retrograde near Antares.
"The sun and the moon shine together" is a perfectly normal thing.
The moon and stars are sparse.
Comets with a return period of less than 200 years are called "short-period comets."
The Kepler supernova of 1604 was the last supernova observed by humans in the Milky Way.
Neptune has an orbital period of about 165 years and has only orbited the sun once (2011) since its discovery (1846).
Academic circles have made various speculations on the light-emitting mechanism of stars. In the end, Eddington's nuclear fusion hypothesis was widely adopted. (Science Squirrel Society: The Story of the Sun (8))
The experimental site used by humans to measure the speed of light for the first time was outer space. (Wikipedia: R?mer's determination of the speed of light)
Transit is a phenomenon unique to the inner planets (Mercury, Venus).
Opposition is a phenomenon unique to outer planets.
The earth is too big, and the moon is not far enough from the earth, so there is no annular lunar eclipse.
As viewed from Earth, the angular diameters of the Sun and Moon are similar (about half a degree).
So the duration of the total solar eclipse will not be too long (up to about seven minutes).
The Sun and Proxima Centauri are approximately 4.22 light-years apart. Suppose there is a highway, and the Sun and Proxima Centauri are two street lights on the highway. One astronomical unit (149,597,870,700 meters) is equivalent to one centimeter, then the two street lights are about 2.67 kilometers apart, and there is no light source between them. (For related discussions, see: How empty is the universe?)
Academic circles currently believe that the formation of the asteroid belt is due to the huge gravitational effect of Jupiter, which prevents the asteroids in the belt from gathering together, rather than the explosion of a prehistoric planet. The fragments left behind.
(For related discussion, see: Assuming enough time and energy, is it possible for humans to reunite the stars in the asteroid belt into a large planet?)
The relationship between meteoroids, meteors, and meteorites is: Meteoroids fall into the atmosphere and burn and emit light to form light trails (i.e. meteors). If the meteoroids do not burn up and fall to the ground, they are meteorites.
Spring Festival and New Year’s Day cannot meet. (For related discussion, see: Can the Spring Festival coincide with New Year’s Day?)
The chance of celebrating the Spring Festival twice a year is very, very, very low. (For related discussions, see: Is there a leap month in the lunar calendar?)
The reason why total solar eclipses are rare is not that they occur less frequently (it is estimated that they occur once every 1 to 2 years on average), but that the total eclipse zone is very narrow (the width is only tens of kilometers).
If you are lucky enough, it is not a problem to take a plane at night and see the sky full of stars, and you can even see the Milky Way. (For related discussions, see: Shouldn’t the sky be full of stars when flying at night? Why are they rarely seen in practice?, Is it feasible to take a night flight to see the Milky Way?, Is it possible to take clear photos when a commercial airliner flies into the stratosphere late at night? Milky Way? )
Strictly speaking, Voyager 1 only entered interstellar space rather than flew out of the solar system. (For related discussions, see: Did Voyager 1 really fly out of the solar system?)
It is generally believed that there are 21 stars with visual magnitudes brighter than 1st magnitude (including 1st magnitude) in the sky (nonsense of course) excluding the sun).
It was not until the last century (1920s) that the academic community generally reached a consensus that some so-called "nebulae" (such as the "Andromeda Nebula") are actually distant extragalactic galaxies. (Wikipedia: Shapley-Curtis dispute)
Most of the English names of the eight planets come from gods in Roman mythology. (For related discussions, see: Why do the English names of the nine planets use the names of gods from Roman mythology instead of gods from Greek mythology?)
Copernicus believed that the sun is the center of the universe (related discussions See: Would Copernicus think the sun was the center of the universe? )
The law of gravity passed at least two major tests after it was proposed: predicting the return of Halley's comet and calculating the position of the (then undiscovered) Neptune. .
However, it was later discovered that the observed values ??of Mercury's perihelion precession were not consistent with the theoretical values, causing the academic community to question the correctness of Newton's theory. (Wikipedia: Anomalous Precession of Mercury's Perihelion)
Foucault's Pendulum proves that the Earth is rotating. (For related discussion, see: Why is the Earth said to be rotating? Is this provable or hypothetical?)
Saturn is less dense than water.
Jupiter's Great Red Spot has been around for at least 350 years. (Wikipedia: Great Red Spot)
All four gas giant planets have rings. (PS: I have seen software that translates "gas giant" into "gas giant"...)
The magnitude difference is 5 magnitudes, and the brightness difference is 100 times.
Absolute magnitude refers to the visual magnitude of a celestial body when it is placed at a specified location (default 10pc).
Star spectra can be roughly divided into seven types: OBAFGKM, there is a simple memory formula: "Oh Be A Fine Girl Kiss Me"
There is a certain relationship between the absolute magnitude of a star and its spectral type .
Astronomy and astrology parted ways during Galileo's time.
Understanding a bunch of common knowledge about astronomy does not mean that it will increase the success rate of picking up girls.