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The refracting (lens) telescope was invented in the 1600's, with the reflecting (mirror) variant a few decades later. Prior to that, naked eye observations had to suffice, but with a keen eye, several important observations were possible.
An early instrumental observation of importance, was Ole Romer making measurements of the rotation of the moons of Jupiter.
Nevertheless, folk without optical instruments, such as the Chinese and the Polynesians, were able to navigate accurately by star sightings.
From the discrepancies of the Io eclipses, comparing the times when Jupiter was moving away to those when Jupiter was moving closer, Rome was able to deduce the speed of light.
A very important observation in the days before accurate chronometers. In those times, the movement of the heavenly bodies was the most accurate 'clock' known.
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How did people study stars 200 years ago?
they looked
How did people observe stars during the 1600's?
The telescope was invented in 1620 so they used that. Man's observation of the stars and planets has been going on thousands of years.
What are the early people whose ideas are about the stars the moon and the sun?
today scientists use telescopes, cameras, and computers to study how the stars and other objects in the sky seem to move. we have learned a lot about the stars since people looked at the sky thousands of years ago
How long ago were the planets made?
Earth, along with the other seven planets in our solar system, formed around 4.6 billion years ago. Exoplanets, the planets orbiting other stars, would have formed at varying times in the past.
Is the Orion belt inhabited?
Do those stars have planets which have people? How would we know? Best guess, though, is no, they don't. Reason: those stars are giants; they burn out in a (cosmically) brief time, so Life, which took 3+ billion years to get to us, just wouldn't have that amount of time to develop.
How did people study stars 200 years ago?
they looked
How many years after Luthers criticism did Galileo begin to study planets?
How many years after Luther’s criticism did Galileo begin to study planets?
How did people observe stars during the 1600's?
The telescope was invented in 1620 so they used that. Man's observation of the stars and planets has been going on thousands of years.
Why did sailors use the stars and not the planets to find their way at sea?
Because stars not like planets revolve and stars last at the night sky for many many years even at your lifetime.
Are planets older than stars?
No. Planets are formed after stars are and in most cases planets are consumed by the same star. Some stars can exist long after they have exhausted their supply of hydrogen and heavier element as red giants. Some even may last over 100 of trillions of years.
When should you use light years?
Light years are used to measure distance from Earth to distant stars and planets.
What are the early people whose ideas are about the stars the moon and the sun?
today scientists use telescopes, cameras, and computers to study how the stars and other objects in the sky seem to move. we have learned a lot about the stars since people looked at the sky thousands of years ago
Why are stars brighter than planets?
They are a lot closer than the stars. The nearest star, Alpha Proxima is 4 light years away. The planets are at most a few light hours away. Although they don't emit light, several of them have cloudy or sandy surfaces, making them highly reflective of sunlight. Some planets seem brighter - not all of them. Planets are quite near to us, as compared to the stars.
Are there other stars that have planets apart from the sun?
Scientists used to wonder; are planets rare, or are they common? Arguments went both ways. But over the past 10 years or so, we have discovered over 300 planets orbiting other stars. With the rapid improvement in space-based telescopes and better image processing software, it begins to look like planets, and planetary systems, may be the norm; that single stars without planets may be the unusual case.
Astrology is the study of what?
the study of the influence of the planets on people. Each of us has our planets in specific signs when we were born and these will indicate a certain personality in the person as wha the planets represent the same principle is within each of us.
What is responsible for making the stars shine?
Stars are formed when elevation gass escapes the sun. They will then catch heat from planets, the planets orbit will then place the stars in a special order. Then the star will glow for 10,000 years then will die.
How many planets and what are they called?
There are 8 planets in the solar system: Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune However, there have been over 1000 planets discovered in the last 20 years orbiting other stars.
