Prabin Kalikote

The pieces of stone or metal which enters the earth's atmosphere are called meteors.
A meteors lasts for very short time and completely finished in atmosphere because the small rock pieces burn and vaporize completely due to the excessive heat produced by the atmospheric friction.

The rocks and metal objects which are present in between the orbits of Mars and Jupiter that revolve around the sun are called asteroids or minor planets.

Planets are the heavenly bodies which revolve around the sun in elliptical orbits.
Those planets which are present inside the asteroid belt are called inner planets.
Those planets which are present outside the asteroid belt are called outer planets.

The family of sun, including all planets and their satellites, meteors, comets, asteroids, etc. is called the solar system.
We know,
        Speed of light = 3 x 10⁸ m/s.
        Time = 1 year.
We have,
Distance travelled by light in 1 year = speed of light * time
                                         ...

The universe is all of spacetime and everything that exists therein including all planets, satellites, stars, galaxies, constellations, comets, dust particles, matter, energy. etc.
The units to measure the distances between any two heavenly bodies are:
        - Astronomical Unit (AU)
                        1AU ----------> 1.5 * 10¹¹m.
        - Light Year
...

Climate change causes increase in atmospheric pressure and temperature. The Increase in temperature has negative impacts on agriculture, forests, human health, bio-diversity, socio-economic aspects, etc. in Nepal. Thus, it is essential to generate awareness regarding the ways to adapt to climate change and its effects. In this regard Climate Change Policy, 2067 has been developed with the specific objectives and policies.

The international efforts are:
        - The United Nations Framework Convention of Climate Change (UNFCCC).
        - UN Climate change conference.
        - Agenda 21.
        - Intergovernmental forum.
        - Kyoto Protocol.
        - Measures to reduce GHG on the basis of Kyoto Protocol.
      ...