72 questions and answers in this section

Natural Sciences » Astronomy

Explain why do some stars die by forming black holes?

Explain why do some stars die by forming black holes?

The birth of a star occurs in cosmic clouds of gas and dust called nebulae. Under the influence of gravitational forces, these clouds begin to...

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Explain why some ancient civilizations built sophisticated astronomical observatories?

Explain why some ancient civilizations built sophisticated astronomical observatories?

Ancient civilizations built sophisticated astronomical observatories to observe celestial movements. These structures were used to study precisely the trajectories of the stars, planets, and other...

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Explain why does the Moon move at different speeds in the sky?

Explain why does the Moon move at different speeds in the sky?

The Moon takes about 27.3 days to complete one full revolution around the Earth. This period is called the lunar revolution period. However, it is...

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Explain why do certain regions of the world experience total eclipses more frequently than others?

Explain why do certain regions of the world experience total eclipses more frequently than others?

The inclination of the Earth's rotation axis is a key factor in the frequency of total eclipses in different regions of the world. The Earth's...

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Explain why can observing stars reveal their chemical composition?

Explain why can observing stars reveal their chemical composition?

Emission and absorption spectra are fundamental tools in astronomy for studying the chemical composition of stars. Emission spectra appear as bright lines on a dark...

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Explain why can't light escape from a black hole?

Explain why can't light escape from a black hole?

The intense gravity of a black hole is the primary factor that prevents light from escaping. A black hole is a region of space where...

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Explain why can eyes hurt after an eclipse?

Explain why can eyes hurt after an eclipse?

Exposure to sunlight during an eclipse can be dangerous for the eyes. Even during a total eclipse, when the Sun is completely covered by the...

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Explain why are there leap years?

Explain why are there leap years?

The solar year is the time it takes for the Earth to complete one full orbit around the Sun. This duration corresponds to approximately 365.25...

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Explain why are stars round?

Explain why are stars round?

Gravity is a fundamental force of the universe that attracts objects towards each other due to their mass. When a celestial body like a planet...

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Explain why does the day last 24 hours?

Explain why does the day last 24 hours?

The Earth completes a full rotation on itself in about 24 hours. This rotation movement is responsible for the day-night cycle that we observe. The...

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