Astronomy Learning

2021-09-02 16:56:34 CBSE Board Exam 2021-22 Term 1 Sample Papers for Class 10 and 12 have been released.

Check it now:-
Sample Papers of Class X:-
http://cbseacademic.nic.in/SQP_CLASSX_2021-22.html
Sample Papers of Class XII:-
http://cbseacademic.nic.in/SQP_CLASSXII_2021-22.html Open / Comment

2021-09-01 05:30:08 Astronomy Events (September 2021)

September 1:- Aurigid Meteor Shower
September 7:- New Moon
September 14:- Neptune at Opposition
September 14:- Mercury at Greatest Eastern Elonganation
September 20:- Full Moon (Harvest Moon)
September 20:- Mars at Apogee
September 22:- September Equinox Open / Comment

2021-08-30 13:02:06 How far we have explored space and how far can we go?

141 AU which is equal to 141 times of the distance between Earth and Sun, Voyager 1 is able to travel the most in history. Even after travelling at the speed of 17 km/sec in space, which may sound a lot, it will take 1,700,000,000 years for Voyager 1 to cross the Milky Way Galaxy. Proxima Centauri, the second closest star from Earth after Sun is 4.2465 light year away and it would took 40,000 years for Voyager 1 to reach it. Parker Solar Probe recorded the highest speed in space which is 692,000 km/h and still it would take more than 50,000 years to reach destinations like Proxima Centauri. Now if we need to explore exoplanets, the factor we need to devolop is speed. Out of many ways, most well known way to travel faster in space is Warp Drive where we use Antimatter to gain speed. Antiatoms are successfully built and research over Antimatter are being done. Big Bang should have produced huge amount of Antimatter which may be lying far away in Universe. Open / Comment

2021-08-26 13:21:44 Elon Musk: Shaping The Future

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2021-08-26 06:53:39 Patterns in the Nature

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2021-08-25 11:07:38 Helix Nebula in 3D

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2021-08-25 08:13:42 A galactic year is the time it takes the solar system to do one orbit of the Milky Way Galaxy, 225-250 million years. The solar system has been in existence for 20 galactic years. At 7 galactic years the first bacteria appeared, and at 19.999 galactic years the first humans emerged Open / Comment

2021-08-24 14:23:10 How were those first stars formed?

Nebulas formed after the Big Bang are vastly known as the home of stars. The gas and dust present inside them were in normal state till any object from the outside created any disturbance. Any object from space that passed near the Nebula or hit that, started movement inside it. These huge movements which were caused by the gravitational force bended the space-time and the gas and dust inside it started to be attracted at a single point. They were attracted till they make up a huge mass like that of Sun or even 100 times bigger than it. This process took millions of years itself. Since it was gaining energy it's temperature kept rising and it became a Pre-stellar core. When the temperature is 1000°k the process of Hydrogen fusion started. And thereafter the Pre-stellar core evolved into a Star. Open / Comment

2021-08-24 07:25:24 About Stellar Corona

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2021-08-23 18:00:10 Why don't we receive light from all the stars in the universe?

There are about 6000 stars that are clearly visible to the naked eye above Earth. Yet we know that there are millions of stars in the universe. Since all stars are putting out light and other kinds of electromagnetic radiation and since light can travel for huge distances in space, why can't we see all the stars?

All stars, like our Sun, send out a huge amount of electromagnetic radiation, including light. However, that light spreads out with distance, making it so that only a tiny fraction reaches us. In addition, depending on the temperature of the star, the main color of light sent out by the star changes. Cooler stars put out redder light, hotter stars put out blue or white light. Generally, colors like white or blue are stronger colors (shorter wavelength, higher frequency) and can be seen more easily at far distances than reds, oranges or yellows. Also, some stars are simply larger than others and send out more light. Open / Comment