In 1610, Galileo pointed his telescope toward Jupiter, and found four bodies orbiting the planet, Galilean moons. The Galilean moons are the four largest moons of Jupiter. These moons are also as mysterious as the planet Jupiter itself.
1) ππ¨π₯π’π£π:
Europa's surface is mostly water ice, and the icy crust is believed to hide a subsurface ocean of liquid water. Europa is thought to have twice water as Earth. Europa is one of the places that catch scientists' attention because of the potential for hosting life
2) ππ’:
Io is the most volcanically active body in the solar system. As it's the inner most moon of Jupiter, immense gravity
causes tides in Ioβs surface 100 meters high, give rise to the volcanic activity. Its
surface is covered by sulfur and lava in many colorful forms.
3) ππππππ¦π§π’:
Callisto has an icy surface covered by craters of various shapes and sizes. Scientists think the bright areas are ice and the darker patches are areas where the ice has eroded. Callisto is a dead moon and craters on moon are believed to be million years old.
4) πππ‘π¬π πππ:
Ganymede is the largest moon in the solar system even larger than the planet Mercury and the dwarf planet pluto, and is the only moon known to have its own internally generated magnetic field and atmospheric auroras.
π§ππ§ππ‘:
After discovery of Galilean Moons Titan was the first moon to discover. It's largest Saturn moon and second largest satellite in Solar System. Titan has clouds, rain, rivers, lakes and seas of liquid hydrocarbons like methane and ethane.
β’ β’ β’
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All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets. As of present, there are more than five thousand confirmed exoplanets in more than 4 thousand planetary systems.
1) ππππ-2π½:
Discovered in 2011, it is the πππππππ ππππππ ever known. The planet's atmosphere reflects less than 1% of the light that falls on it. It is a gas giant located about 750 light years away from us with a radius approximately 1.2 times that of Jupiter.
2) ππ -504π½:
Known as the πππππππ πππππππππ, it orbits a sun-like star and was discovered in 2013. Its atmosphere contains methane giving it a pinkish hue that sets it apart. GJ-504b is roughly 160 million years old and has a mass about four times of Jupiter.
Elementary particles are the fundamental building blocks of matter, that have no internal structure. As of the present date, we know 61 elementary particles. That are categorized in three groups: quarks, leptons, and bosons.
Almost all everyday phenomena can be described by the interactions of just four of these particles: electron, neutrino, "up" quark, and "down" quark.
Quarks are confined; they can't be observed alone and can only exist in bound states.
The proton (uud) and neutron (udd) are the lowest energy states formed by combinations of three quarks. Leptons are point-like particles that do not undergo strong interactions. The most common lepton is the electron.
Black hole is a place in space where laws of physics as we know them fail. Black holes have an intense gravitational field that nothing, not even light, can escape. The term "Black Hole" was coined in 1967 by American Physicist John Wheeler.
The concept of an object so massive and dense that nothing can escape from its gravity was proposed at the end of the 18th century. A dark star with an intense gravitational force that can pull light.
In 1915, Albert Einstein published his theory of general relativity, which has a great relation with black holes. However, Einstein himself didn't believe that they could exist. A year later, Karl Schwarzschild proved that black holes are a solution to Einsteinβs equations.