Although the light year is a
commonly used unit, astronomers
prefer a different unit called the parsec (pc). A parsec, equal to 3.26
light years, is defined as the distance at which 1 Astronomical Unit subtends an
angle of 1 second of arc (1/3600 of a degree) When we use the parsec for really
large distances, we often put a prefix in front of it - like kiloparsecs (kpc),
which are equal to 1000 parsecs - or Megaparsecs (Mpc), equal to a million
parsecs.
The Milky Way is about 1,000,000,000,000,000,000 km
(about 100,000 light years or about 30 kpc) across. The Sun does not lie near
the center of our Galaxy. It lies about 8 kpc from the center on what is known
as the Sagittarius arm of the Milky Way.
Answer:The phase of moon when between new moon and half moon is crescent and more than half and less than full is gibbous. Thus, during waxing gibbous and waning gibbous, the phase of the moon would be more than half of moon's surface.
Explanation:Waxing gibbous
June solstice is the time when the Northern Hemisphere is
tipped most specifically toward the Sun and gets the most direct daylight. It
happens around June 21 (also called summer solstice) on the day where the Sun
takes after its longest and most elevated way through the Northern Hemisphere
sky and its shortest way through the Southern Hemisphere sky.
Answer: African environmental issues are caused by anthropogenic effects on the African natural environment and have major impacts on humans and nearly all forms of endemic life. Issues include desertification, problems with access to safe water supply, population explosion and fauna depletion.
Explanation: Hope it helps
Develop renewable resources, improve agricultural methods, improve fuel efficiency, and reduce petroleum use
