Posts Tagged ‘cosmos’

Cosmos – My learnings

Sunday, May 17th, 2015

I am watching Carl Sagan COSMOS and this post is in continuation to my earlier one. In this post, I have tried to simplify the mystery of Cosmos, in my language.

1. The space scientists simplified distance measurements by assigning the distance of earth from the sun as one Astronomical Unit (AU), which is equivalent of 150 million Km

2. Mercury, Venus, Earth and Mars have clear surfaces while Jupiter, Saturn, Uranus and Neptune have lots of materials floating.

3. Voyager 1 and 2 were sent to explore Mars, Jupiter and Saturn on 20 August 1977 with a 4-year mission. But it continues till date.

4. The NASA scientists have used the alignment of Jupiter, Saturn, Uranus and Neptune, which happens once in 175 years, to launch Voyager.

5. Voyager’s speed is 3.5 AU per year, which means over 500 million Km per year. Voyager 2, weighing 722 KG, consumes only 400 watts for such a speed generated by nuclear source and usage of gravitational force (since it is so far from Sun, it can not use solar power).

6. Voyager 2 is still working after 37 years and sending signals to earth.

7. The current location of Voyager 2 is over 100 AU – 16 billion km and send pictures of interstellar space.

8. Voyager 1 is crossing the helio sheath from north and voyager 2 is moving towards south.

9. With proper conservation of energy, it’s predicted that they can last upto 2025.

10. The initial budget of the project was 865 million dollars. NASA spends just 5 million dollars to sustain this initiative.

Eye on the skies

Eye on the skies

Cosmos

Friday, May 1st, 2015

I was watching a video, created by Carl Sagan, on the cosmos. The videos are depicted beautifully in simple language and visuals, the complexity of COSMOS. There are 7 DVDs.

2 random Questions

1. The diameter of Earth is 12600 Kms. At what speed Earth rotates which we don’t feel?

2. What is a Astronomical Unit?

Earth_Eastern_Hemisphere