The Earth is approaching Silverheart Black, will it be swallowed up in the future?

Earth is one of the eight planets in our solar system, the third in order of proximity to the Sun, and the largest Earth-like planet in our solar system in terms of diameter, mass, and density, at a distance of 150 million kilometers from the Sun. The Earth rotates from west to east while revolving around the Sun. It is 4 to 4.6 billion years old and has a natural satellite, the Moon, which forms a celestial system, the Earth-Moon system. 4.6 billion years ago it originated in the primordial solar nebula.

Mass

Main article: Earth's mass

Stellar bodies

The mass of the Earth, according to Cavendish, is about 5.96×10^24 kg The equatorial radius of the Earth ra=6378137m≈6378km, the polar radius rb=6356752m≈6357km, the flatness e=1/298.257, ignoring the non-spherical symmetry of the Earth, the mean radius r=6371km. the value of the acceleration of gravity at a sea level at the equator ga= 9.780m/s^2, the value of gravitational acceleration at a sea level at the North Pole gb=9.832m/s^2, the global standard value of gravitational acceleration g=9.807m/s^2, the Earth's rotation period is 23 hours 56 minutes 4 seconds (sidereal day), that is, T=8.616×10^4s.

Temperature

The temperature of the Earth's surface is influenced by solar radiation, and the global average surface temperature is about 15℃. In contrast, deep underground, where sunlight is not seen, the temperature is mainly influenced by geothermal heat, which increases with depth. The temperature of the Earth's core at the center of the planet is even higher than 6000°C, higher than the surface temperature of the solar photosphere (5778K, 5500°C). The hottest place on the Earth's surface is Basra, where the maximum temperature is 58.8°C. The "cold pole" of the Earth's northern hemisphere is in Oymyakon, in the mountains of Eastern Siberia, where the lowest temperature in January 1961 was -71°C. The world's "cold pole" is in the Antarctic continent, where the Russians recorded the lowest temperature of -89.2°C at the Eastern Station in early 1967.

Electricity

Because the Earth rotates from west to east, and the geomagnetic field externally points from the magnetic north pole to the magnetic south pole (i.e., the south pole points to the north pole), the circular current formed is opposite to the direction of the Earth's rotation, so it is negatively charged.

Shape

Main article: Shape of the Earth

During a lunar eclipse, careful observation reveals that the shadow of the Earth projected on the Moon is always round; when traveling south or north for long distances, one finds that the same star is at different heights in the sky. Some wise ancient people have already guessed from such clues that the Earth may be spherical. Ptolemaeus' geocentric theory also clearly described the idea of a spherical Earth, but it was not until the Portuguese navigator Magellan's fleet completed the first circumnavigation of the globe in human history in the 16th century that he proved irrefutably that the Earth was a sphere in practice.

Scientists after a long period of precision measurement found that the earth is not a regular sphere, but a polar area slightly flat equator slightly bulging irregular ellipsoidal sphere, exaggeratedly, a bit like a "pear", called "pear-shaped body". Earth's equatorial radius is about 6378.137 Km long, this difference compared with the average radius of the Earth, very small, from cosmic space to see the Earth, can still be regarded as a regular sphere. If you make a globe with a radius of 1 meter according to this scale, the equatorial radius is only about 3 mm longer than the polar radius, which is difficult to notice with the human eye, so it is always made into a regular sphere when making a globe.

The Earth in the Universe

The Earth's position in the universe has undergone a radical expansion of this understanding in the last century. At first, the Earth was thought to be the center of the universe, and knowledge of the universe at the time included only those planets visible to the naked eye and the seemingly fixed stars on the celestial sphere. heliocentrism was widely accepted in the 17th century, followed by observations by William Herschel and other astronomers that the Sun was located in a disk galaxy of stars. By the 20th century, observations of spiral nebulae showed that our Milky Way was only one of the billions of galaxies in an expanding universe. In the 21st century, the overall structure of the observable universe began to become clear - superclusters of galaxies form a vast mesh of large-scale fibers and voids. Superclusters, large-scale fibrous structures, and voids are probably the largest coherent structures that exist in the universe. At larger scales (billion-second gaps and beyond) the universe is homogeneous, meaning that all parts of it have the same density, composition, and structure on average.

There is no "center" or "boundary" of the universe, so we cannot mark the absolute position of the Earth in the entire universe. The Earth is at the center of the observable universe because observability is determined by the distance to the Earth. At various scales, we can use a particular structure as a frame of reference to give the relative position of the Earth. It is still not possible to determine whether the universe is infinite.