Scientist latest Extrasolar planets discoveries and Multiplanetary systems| latest Science knowledge

Over the years, with the advancement of the world in every field specially science and technology, every Scientific community and scientific organization of the world are competing in exploring not only our solar system, galaxy but the entire universe .

 with the advancement of Telescope and other scientific observatory technology, scientist have discovered more than 5000 to 6000 planets(exoplanets) out of our solar system.

it is learn that every star we see at night sky in our milky way galaxy has a planet orbiting in it.

 it is very exciting to learn that our universe is fill with stars and planets system like our solar system , through this observation and discoverers by modern scientist we also come to learn that we are not unique as will as alone in the universe. 

list of Extrasolar planets:

-Kepler-186f 

Kepler-186f parent star is a red dwarf, so the alien world is not a true Earth twin. the planet lies about 500 light years from Earth.

-55 Cancri e.

55 Cancri e, this super-earth orbits a star that is bright enough to see by eye, meaning astronomers can study the system in more detail than almost any other.

-51 Pegasi b

This exo planets is the first confirmed discovery of a world orbiting a sun-like star, in 1995. 51 Pegasi b is a jupiter-mass planet 20 times closer to its sun.

-Kepler-452b

Kepler-452b is a super-earth exoplanet orbiting within the inner edge of the habitable zone of the sun-like star.

-Kepler-442b

Kepler-442b a rocky planet about twice the mass of the earth, Kepler-442b orbits a moderately hot orange dwarf star around 1,120 light years away from earth.

-Kepler-1649c

-Kepler-62f

-Kepler-69c

Kepler-69c  host star is about 80 percent as  luminous as the sun, so the planet appears to be in the habitable zone.

-Gliese 581c

-Kepler-90i

the planet was discovered in data from NASA's Kepler space telescope. Kepler90i a sizzling hot, rocky planet that orbit its star once every 14.4 days.

-KELT-9b

-Teegarden's star b

-OGLE-2016-BLG-1195Lb

Multiplanetary system.

There are at least 3,979 stars to be known to have an exoplanets, as of  1st June 2023, there are a total of 859 known multiplanetary system or stars with at least two confirmed planets beyond the solar system. Here is the List of Multiplanetary system

Solar system with most planets.

The stars with the most confirmed planets are Sol (Solar system star, also referred to as the Sun) and Kepler-90 with 8 confirmed planets each, followed by TRAPPIST-1 with 7 planets.

the biggest star.

The biggest star in the universe that we know so far is UY Scuti  it is a variable hypergiant with a radius around 1,700 times larger than the radius of the sun. in perspective, the volume of almost 5 billion sun could fit inside a sphere the size of UY Scuti.

Galaxy that has 1 Trillion stars.

The Andromeda Galaxy contains roughly one trillion stars, while the Milky way Galaxy is estimated to contain roughly 250 billion stars.

Beyond the universe.

The trite answer is that both space and time were created at the big bang about 14 billion years ago, so there is nothing beyond the universe.

however much of the universe exists beyond the observable universe, which is maybe about 90 billion light years across.

The smallest star.

Finally, astronomer can point out that star who can be awarded as the smallest star in the universe that is EBLM J0555-57Ab, 

according to 2017 study published in the Astronomy and Astrophysics journal. the star is smaller than the Saturn and barely qualifies as a star. 

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