<h2>
Answer: 10 parsecs</h2>
Parallax is the angle formed by the observation lines to a very distant object from two separated points.
The procedure to measure this distance in the case of a star, is based on observing it from two different places far away from each other, and then through trigonometry reach to the following relationship:
(1)
Where:
is the distance from Earth to the observed star (in Parsecs )
is the earth-sun distance that is equivalent to an astronomical unit (1AU=150000000km)
is the angle of the parallax (in arc seconds )
Now, the distance to an object (measured in parsecs) is the reciprocal of the parallax (measured in arcseconds).
Then, in its simplified mode, the stellar parallax is given by the following equation:
(2)
<u>Finally we have the distance to the star:</u>
The map below tells that humans emigrated from Africa throughout the Middle East and into Europe.
Answer: Option D
Explanation:
It is believed that early humans (Homo Erectus) migrated to all the continents in the world. When the first humans were start evolved in Africa they started to explore all over the places.
But Homo Sapiens migrated out of the continent, also traveled via Nile Valley and then red Sea. Finally, they reached middle east countries Oman, Arab countries and Israel. Modern humans( Neanderthals) finally arrived in Europe nearly 40,000 years ago.
At the time they were in both Europe and Middle East countries. They spread over the middle east and Europe they started living their lives there. Also, they started adultered with the Denisovans( homo sapiens type lived in Europe) and further migrated to Central Asia.
Answer:
Characteristics used to classify stars include color, temperature, size, composition, and brightness.
Explanation:
A characteristic of popular culture is its accessibility to the masses.
Popular culture is the culture of the people that exists or predominates in a society at a certain point in time. Popular culture is based on the interaction between people in their daily activities in terms of greeting rituals, food type, dress styles, and the use of slang. Examples of popular culture include sports, popular music, cyber culture, advertising and television.