वैज्ञानिक भी है हैरान अंतरिक्ष की इन खोजों से || TOP 10 UNSOLVED DISCOVERIES OF THE UNIVERSE

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Our universe is filled with mysterious objects and occurrences that have baffled man since the dawn of time. To this day scientists are scratching their heads over some questions about our universe, and to get you thinking too here are the top 10 mysteries of the universe.
Space is a big place and there’s a lot going on. Astronomers are finding out new things about our galaxy and universe all the time. So what are the latest space discoveries? Well, a black hole with a boarding pass and seat on a plane, a place where you’ll have two shadows, and bad news for Orion the constellation – these are some of the freshest space facts we only recently discovered!

And guys, if you've always wanted to know how many stars are in our galaxy, there's good news for you. The Gaia Mission has been working on making a 3D model of our galaxy and getting a more accurate count of the number of stars in it. They thought it was 1 billion, but that estimate could be up to 400 or even 700 billion stars!


Voyager 1 is a space probe launched by NASA on September 5, 1977. Part of the Voyager program to study the outer Solar System, Voyager 1 was launched 16 days after its twin, Voyager 2. Having operated for 41 years, 11 months and 7 days as of August 12, 2019, the spacecraft still communicates with the Deep Space Network to receive routine commands and to transmit data to Earth. At a distance of 146 AU (21.8 billion km; 13.6 billion mi) from Earth as of July 11, 2019[3] it is the most distant man-made object from Earth.

The probe's objectives included flybys of Jupiter, Saturn, and Saturn's largest moon, Titan. Although the spacecraft's course could have been altered to include a Pluto encounter by forgoing the Titan flyby, exploration of the moon took priority because it was known to have a substantial atmosphere.[5][6][7] Voyager 1 studied the weather, magnetic fields, and rings of the two planets and was the first probe to provide detailed images of their moons.

After completing its primary mission with the flyby of Saturn on November 12, 1980, Voyager 1 became the third of five artificial objects to achieve the escape velocity required to leave the Solar System.[citation needed] On August 25, 2012, Voyager 1 became the first spacecraft to cross the heliopause and enter the interstellar medium.

In a further testament to the robustness of Voyager 1, the Voyager team completed a successful test of the spacecraft's trajectory correction maneuver (TCM) thrusters in late 2017 (the first time these thrusters were fired since 1980), a project enabling the mission to be extended by two to three years.[9]

Voyager 1's extended mission is expected to continue until about 2025 when its radioisotope thermoelectric generators will no longer supply enough electric power to operate its scientific instruments.
Each Voyager space probe carries a gold-plated audio-visual disc, should the spacecraft ever be found by intelligent life forms from other planetary systems.[89] The disc carries photos of the Earth and its lifeforms, a range of scientific information, spoken greetings from people such as the Secretary-General of the United Nations and the President of the United States and a medley, "Sounds of Earth," that includes the sounds of whales, a baby crying, waves breaking on a shore, and a collection of music including works by Wolfgang Amadeus Mozart, Blind Willie Johnson, Chuck Berry and Valya Balkanska. Other Eastern and Western classics are included, as well as various performances of indigenous music from around the world. The record also contains greetings in 55 different languages.
Voyager 2 is a space probe launched by NASA on August 20, 1977, to study the outer planets. Part of the Voyager program, it was launched 16 days before its twin, Voyager 1, on a trajectory that took longer to reach Jupiter and Saturn but enabled further encounters with Uranus and Neptune.[4] It is the only spacecraft to have visited either of these two ice giant planets.

Its primary mission ended with the exploration of the Neptunian system on October 2, 1989, after having visited the Uranian system in 1986, the Saturnian system in 1981, and the Jovian system in 1979. Voyager 2 is now in its extended mission to study the outer reaches of the Solar System and has been operating for 41 years, 11 months and 21 days as of 10 August 2019. It remains in contact through the NASA Deep Space Network.[5]

At a distance of 120 AU (1.80×1010 km) (about 16.4 light-hours)[6] from the Sun as of February 25, 2019,[7] moving at a velocity of 15.341 km/s (55,230 km/h)[8] relative to the Sun, Voyager 2 is the fourth of five spacecraft to achieve the escape velocity that will allow them to leave the Solar System. The probe left the heliosphere for interstellar space on November 5, 2018,[9][10] becoming the second artificial object to do so, and has begun to provide the first direct measurements of the density and temperature of the interstellar plasma.