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.
The 2010 census indicates that since 1960 Mexico’s population has more than tripled to 112.3 million. However, the growth rate between 2000 and 2010 (1.4% per year) is less than half the 3.4% rate of increase experienced in the 1960s. If Mexico’s population had continued to grow at 3.4% since 1960, it would have been over 186 million by now!
Answer:
Earth
Explanation:
The cosmic address of the Earth would begin with the house address, the name of our planet, Earth. Next, we would put our street name, Inner Solar System. Then, we would choose our city, Solar System of the Sun. After that, we would add our state or province. This would be the equivalent of the Solar Neighborhood which consists of all stars within 15 light years of the Sun and that include mostly cool and small red dwarf stars. After that, we would be part of the Sagittarius Arm of the Milky Way and then in the Local Group of Galaxies that include the Magellanic Clouds and many more.
Answer:
1. Northern England Wilderness Area
2. Mongolia
3. Willis Island
4. Hulia (Africa)
5. Barranquilla (Northern South America)
Answer:
A
Explanation:
Olive trees are found largely along the coast of Mediterranean climates where the have the ideal precipitation and temperature conditions to thrive. In the mountainous areas further inland, the trees would have to adapt to more extreme temperatures and generally dryer conditions.
The Arabian peninsula does not feature a Mediterranean climate, but instead a desert climate that does not permit the growth of trees outside oases.
