A supermassive black hole is detected at the center of Milky Way galaxy, which is about …….million solar masses.
a)4.3
b)6.5
c)8.6
d) 1.5
All the ……..emit beam of electromagnetic radiations from its poles.
a) black holes
b) red giants
c) white dwarfs
d) neutron stars
The Life of Sun:
This lifespan began roughly 4.6 billion years ago, and will continue for about another 4.5 – 5.5 billion years, when it will deplete its supply of hydrogen, helium, and collapse into a white dwarf. But this is just the abridged version of the Sun’s lifespan.
Like other
stars, our sun is a star. Which of the following reactions energized it at
core?
a) chemical
b) physical
c) biological
d) nuclear
About 4.6 billion years ago large cloud of gas mostly………and dust in our galaxy formed our sun.
a) oxygen
b) helium
c) hydrogen
d) nitrogen
In how much time, the formation of our sun completed?
a)10 thousand years
b) 10 years
c)100 million years
d)10 billion years
When we look at the closest star outside our solar system, Alpha Centauri, we are really looking into the……..
a) future
b) present
c) past
d) all of these
