please send me quickly all question number 2
Answers
The solar system is comfortably nestled in a safe harbor
between major spiral arms, and its nearly circular orbit helps
it avoid the galaxy’s perilous inner regions. There are
relatively few stars near the sun, reducing risks to Earth
from gravitational tugs, gamma-ray bursts, or collapsing
stars called supernovae.
10,000
light-years
20,000
light-years
CORE
YOU ARE HERE
SOLAR SYSTEM
Proxima Centauri
AD Leonis
Eta Cassiopeiae A, B
Altair
SUN
Procyon A, B
Alpha Centauri A, B
Sirius A, B
Delta Pavonis
2
OUR SUN IS A STABLE AND LONG-
LASTING STAR
Stars more massive than the sun burn hotter and usually
don’t live long enough for planets to develop life. Less
massive, younger stars are often unstable and are prone to
blasting their planets with bursts of radiation.
SUN
Relative size
of the Earth
Solar flare
3
WE’RE AT JUST THE RIGHT
DISTANCE FROM THE SUN
Earth orbits in the so-called Goldilocks zone, where the planet
receives enough energy to allow water to exist as a liquid
on its surface. Too far, and the vital compound stays locked
up as ice. Too close, and the water would rapidly
evaporate into the atmosphere.
NEPTUNE
URANUS
SUN
EARTH
SATURN
MERCURY
About 93 million miles
from Earth to Sun
VENUS
4
WE HAVE THE RIGHT STUFF TO
HOST A DYNAMIC CORE
The interstellar cloud of gas and dust that gave rise to
Earth contained enough radioactive elements to power a
churning core for billions