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What do you think that astronomers mean when they use the term observable universe?
They mean the part of the universe that we can see with the naked eye, through telescope, or the amount of light years we can travel without dying
What was Ptolemy's idea on space?
that the earth was in the middle of the universe
Which of the ancient Indians' achievements do you think is most impressive?
Hindu Arabic numerals
What is the ptolemy theory?
i think he was tring to figure out how the universe was shaped. he probably thought the earth was in the middle of everything because we could see the sun and the moon from earth, but the other planets only at certin points each year
Which ancient egyptian contribution do you think had the greatest impact on later civilizations?
ancient egypt
In what part is a black hole in the universe?
Astronomers believe that black holes exist in the center of every universe. They even think that there may be a black hole in the center of our galaxy, the Milky Way
What did people use to think the center of the universe was?
Before the heliocentric model of the solar system, people believed that the Earth was at the center of the universe. This geocentric model was commonly accepted in ancient times and throughout the Middle Ages.
What did most ealy astronomers think made up the universe?
Early astronomers believed that the universe was made up of the Earth at the center, surrounded by concentric spheres holding the Moon, Sun, planets, and stars. This model of the universe, known as the geocentric model, was proposed by Ptolemy in the 2nd century.
Who did aristarchus influence?
Aristarchus of Samos influenced later astronomers by proposing a heliocentric model of the universe, where the Sun, not the Earth, was at the center. His ideas laid the foundation for the work of astronomers like Copernicus and Galileo.
What did the early astronomers think the difference between the solar system and the universe?
They thought it was a explosion in the universe so they sent astronauts into space.
What did the earliest astronomers think the difference between the solar system and the universe than you think now?
he thought that the universe and the solar system was the same thing but know we now that they are to separate things
What are 3 observations made ancient astronomers think the earth was in the center of the universe?
The daily motion of celestial bodies appeared to revolve around the Earth, suggesting it was the central point. Retrograde motion of planets, where they appeared to move backwards in the sky, was explained by placing Earth at the center. The lack of observed stellar parallax (shift in the position of stars due to Earth's orbit) supported the idea of Earth being stationary at the center of the universe.
Who did early people think was the center of the universe?
the earth
Why do astronomers think there is dark matter in the universe?
That is because the dark matter attracts normal matter through its gravitation.
What did astronomers think the solar system looked like?
People thought the earth was in the center of the solar system
Did scientific think the earth was the center of the universe?
Yes, for close to 1,400 years everyone believed the Earth was the center of the universe. It was not till 1543 that a man named Copernicus created a model with the sun as the center of the universe. The Catholic Church clung to the idea of the Earth as the center of the universe for over 90 years.
What do you think that astronomers mean when they use the term observable universe?
They mean the part of the universe that we can see with the naked eye, through telescope, or the amount of light years we can travel without dying
