Confession

Medusa was kinda problematic  :/

Ten interesting facts about Mars

The ancient Sumerians believed that Mars was Nergal, the god of war and plague. During Sumerian times, Nergal was a minor deity of little significance, but, during later times, his main cult center was the city of Nineveh. In Mesopotamian texts, Mars is referred to as the “star of judgement of the fate of the dead”. The existence of Mars as a wandering object in the night sky was recorded by the ancient Egyptian astronomers and, by 1534 BCE, they were familiar with the retrograde motion of the planet. By the period of the Neo-Babylonian Empire, the Babylonian astronomers were making regular records of the positions of the planets and systematic observations of their behavior. For Mars, they knew that the planet made 37 synodic periods, or 42 circuits of the zodiac, every 79 years. They invented arithmetic methods for making minor corrections to the predicted positions of the planets.

Mars is the fourth planet from the Sun and the second-smallest planet in the Solar System after Mercury.

The bright rust color Mars is known for is due to iron-rich minerals in its regolith — the loose dust and rock covering its surface. The soil of Earth is a kind of regolith, albeit one loaded with organic content. According to NASA, the iron minerals oxidize, or rust, causing the soil to look red.

The rotational period and seasonal cycles of Mars are likewise similar to those of Earth, as is the tilt that produces the seasons. Mars is the site of Olympus Mons, the largest volcano and second-highest known mountain in the Solar System, and of Valles Marineris, one of the largest canyons in the Solar System.

Mars has two moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids, similar to 5261 Eureka, a Mars trojan.

There are ongoing investigations assessing the past habitability potential of Mars, as well as the possibility of extant life. Future astrobiology missions are planned, including the Mars 2020 and ExoMars rovers. Liquid water cannot exist on the surface of Mars due to low atmospheric pressure, which is less than 1% of the Earth’s, except at the lowest elevations for short periods. The two polar ice caps appear to be made largely of water. The volume of water ice in the south polar ice cap, if melted, would be sufficient to cover the entire planetary surface to a depth of 11 meters (36 ft). In November 2016, NASA reported finding a large amount of underground ice in the Utopia Planitia region of Mars. The volume of water detected has been estimated to be equivalent to the volume of water in Lake Superior.

Mars can easily be seen from Earth with the naked eye, as can its reddish coloring. Its apparent magnitude reaches −2.91, which is surpassed only by Jupiter, Venus, the Moon, and the Sun. Optical ground-based telescopes are typically limited to resolving features about 300 kilometers (190 mi) across when Earth and Mars are closest because of Earth’s atmosphere.

Like Earth, Mars has differentiated into a dense metallic core overlaid by less dense materials. Current models of its interior imply a core with a radius of about 1,794 ± 65 kilometers (1,115 ± 40 mi), consisting primarily of iron and nickel with about 16–17% sulfur. This iron(II) sulfide core is thought to be twice as rich in lighter elements as Earth’s. The core is surrounded by a silicate mantle that formed many of the tectonic and volcanic features on the planet, but it appears to be dormant. Besides silicon and oxygen, the most abundant elements in the Martian crust are iron, magnesium, aluminum, calcium, and potassium. The average thickness of the planet’s crust is about 50 km (31 mi), with a maximum thickness of 125 km (78 mi). Earth’s crust averages 40 km (25 mi).

Mars lost its magnetosphere 4 billion years ago, possibly because of numerous asteroid strikes, so the solar wind interacts directly with the Martian ionosphere, lowering the atmospheric density by stripping away atoms from the outer layer. Both Mars Global Surveyor and Mars Expresshave detected ionised atmospheric particles trailing off into space behind Mars, and this atmospheric loss is being studied by the MAVEN orbiter. Compared to Earth, the atmosphere of Mars is quite rarefied.

Mars’s average distance from the Sun is roughly 230 million kilometres (143,000,000 mi), and its orbital period is 687 (Earth) days. The solar day (or sol) on Mars is only slightly longer than an Earth day: 24 hours, 39 minutes, and 35.244 seconds. A Martian year is equal to 1.8809 Earth years, or 1 year, 320 days, and 18.2 hours

Mars is scarred by a number of impact craters: a total of 43,000 craters with a diameter of 5 km (3.1 mi) or greater have been found. The largest confirmed of these is the Hellas impact basin, a light albedo feature clearly visible from Earth. Due to the smaller mass of Mars, the probability of an object colliding with the planet is about half that of Earth. Mars is located closer to the asteroid belt, so it has an increased chance of being struck by materials from that source. Mars is more likely to be struck by short-period comets, i.e., those that lie within the orbit of Jupiter. In spite of this, there are far fewer craters on Mars compared with the Moon, because the atmosphere of Mars provides protection against small meteors and surface modifying processes have erased some craters.

Martian craters can have a morphology that suggests the ground became wet after the meteor impacted.

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images: NASA/JPL-Caltech/Univ. of Arizona , ESA, Tunç Tezel

astronomy facts

Indya Moore comes through with a message

i don’t consume media to “have” “fun” i consume media in the same way catholic peasants lashed themselves in the streets in the 1300s

Petitions that still need signatures:

Justice for George Floyd

Justice for Breonna Taylor

Justice For Joāo Pedro

Justice For Emerald Black

Justice For Tony McDade

Justice for Belly Mujinga

Exoneration of Albert Wilson

Justice for Amiya Braxton

Justice for Tete

Justice for Jennifer Jeffley

Justice For Darrius Stewart

Justice for Crystal Mason

Justice for Sean Reed

Justice for Tamir Rice

Justice for Sean

Justice for Dion Johnson

Free Siyanda

Justice For Alejandro Vargas Martinez

Willie Simmons has served 38 years for a $9 robbery

Reopen Kendrick Johnson’s Case

Justice for Cameron Green

Justice for Young Uwa

Justice For Amari Boone

Justice for Rashad Cunningham

Julius Jones is innocent. Don’t let him be executed by the state of Oklahoma

Disbarment of George E. Barnhill

Free Jefferson Elie

Justice for Dafonte Miller

Justice for Andile Mchunu

Justice for Tazne Van Wyk

Reopen Sandra Bland’s case

Fire Racist Criminal Michael J Reynolds from the NYPD

Justice for Ahmaud Arbery- Pass Georgia Hate Crime Bill

Justice For Regis Korchinski-Paquet

Justice for Angelesea Rock

Free Anthony Wint

Justice for James Scurlock

Reopen the case involving the death of Tamla Horsford

Fire Jared Campbell

Justice for Ashton Dickson

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Justice For Mubarak Soulemane

Justice for Sherrie Walker

Justice for Jonas Joseph

Justice for Elijah McClain

Pardon Black Woman Imprisoned for Voting

Arrest Juan DelaCruz for the murder of Pamela Turner

National Action Against Police Brutality

Dismiss the charges on Marshae Jones and charge the one who shot her and her unborn baby

Ban the use of inhumane rubber bullets

“Cats are really clean animals“ 

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Anime_irl

He is the ultimate lifeform

it's 2020...... stop being nice to racists