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Astronomy

The scientific study of celestial bodies. Find questions on Constellations, Planets and more.

500 Questions

When you enter a dark theater on a bright day it takes an appreciable interval of time before you can see well enough to find an empty seat Which of the visual processes is at play in this situation?

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Asked by Wiki User

The phenomenon described in this example is known as "dark adaptation." This usually takes about 20-30 seconds, depending on the intensity of the light in the previous surroundings (in this case, it was a bright day). The reason why we are able to see in a wide variety of environments is because of the photoreceptors found in our retina. These are light-sensitive cells, and are divided into cones and rods. The interaction of cones (day vision) and rods (night vision) is what results in "dark adaptation."

The frequency of waves is given in?

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Asked by Wiki User

There is no such thing as a "unit of measurement for electromagnetic radiation". However, there are units for specific aspects of the electromagnetic radiation. Thus, depending on whether you want to measure its speed, its wavelength, its frequency, its period, its energy, its power, its intensity, etc., you would use different units.

Witch is faster light or sound?

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Asked by Wiki User

Light. Light travels 300,000,000 meters per second, whereas Sound is closer to 340 meters per second. This is why when you see a person hit a baseball from a distance, there is a delay in hearing the sound.

What would the Earth be better without?

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Asked by Wiki User

The question of what the Earth would be better without is complex and subjective, as different people may have varying opinions based on their values and perspectives. However, I can provide you with some common issues that are often discussed as negative aspects of our world. Keep in mind that while some of these issues have negative consequences, they may also have positive aspects or be interconnected in intricate ways. Here are a few things that some people believe the Earth would be better without:

Environmental Pollution: Pollution in various forms, such as air, water, and soil pollution, is a major concern. It harms ecosystems, wildlife, and human health. Eliminating pollution would lead to cleaner air, healthier water bodies, and a more sustainable environment.

Climate Change: Human-induced climate change is causing rising temperatures, more frequent and severe natural disasters, and disruptions to ecosystems. Addressing climate change could help prevent catastrophic impacts and preserve a stable climate for future generations.

Deforestation: Deforestation leads to loss of biodiversity, disruption of ecosystems, and contributes to climate change by reducing the Earth's capacity to absorb carbon dioxide. Preserving forests and reforesting areas can help mitigate these negative effects.

War and Conflict: War and conflict result in loss of life, displacement of populations, and destruction of infrastructure. A world without war would mean more resources and effort could be directed towards improving living conditions and cooperation among nations.

Inequality: Socioeconomic inequality creates disparities in access to resources, education, healthcare, and opportunities. Reducing inequality could lead to a more just and equitable world where everyone has a chance to thrive.

Hunger and Poverty: Billions of people around the world still live in poverty and suffer from hunger. Eliminating hunger and poverty would improve overall well-being and promote social stability.

Disease: Infectious diseases, especially those without effective treatments or vaccines, can cause widespread suffering and death. A world without such diseases would lead to better public health and improved quality of life.

Discrimination and Prejudice: Discrimination based on factors like race, gender, religion, and sexual orientation hinders social progress and equality. A world without discrimination would be more inclusive and accepting.

Corruption: Corruption undermines trust in institutions, hampers development, and diverts resources away from where they are needed most. Eliminating corruption would promote better governance and more efficient resource allocation.

Waste and Overconsumption: Excessive waste generation and overconsumption strain resources and contribute to environmental degradation. Adopting sustainable consumption patterns could reduce these negative impacts.

It's important to note that these issues are often interconnected, and addressing one can have positive effects on others. Achieving a world without these problems is a complex task that requires collective effort, changes in behavior, policy reforms, technological advancements, and a shift in societal values.

What is a rock that is trapped in the orbit of the sun?

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Asked by Wiki User

There are several rocks trapped in the orbit of the Sun.

They are ;-

The four rocky planets , Mercury, Venus, Earth, Mars.

Then there is the Asteroid Belt between Mars and Jupiter. These are 'lumps' of rock moving in an orbital belt about the Sun. One of these rocks can be identified as 'Ceres'.

What is the scientific explanation of the moon's absence?

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Asked by Wiki User

The moon doesn't always rise and set at night, sometimes it rises and sets during the day.

This is dependent on the phase of the moon.

The moon circles the earth once every 28 days.

The closer to full the moon is, the more hours it spends in the sky at night, because it is on the opposite side of the earth as the sun. That's why it is full - the sun is behind you, lighting the moon in front of you. A completely full moon will rise as the sun sets, and set as the sun rises, and will be visible all night.

The closer to "new" the moon is, the fewer hours it spends in the sky during the night, and the more time it spends during the day because it is on the SAME side of the earth as the sun. It appears "new" because the sun is behind it, lighting the far side of the moon. A completely new moon will rise and set with the sun, and will only be visible in the day.. or briefly at dusk.

A half-moon is up half the day and half the night. If you don't see a half-moon at night, it has either already set or hasn't risen yet.

Is the moon an illuminated object?

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Asked by Wiki User

Yes!!! It is illuminated by the Sun.

In fact all the planets, including Earth, are illuminated by the Sun.

We see these plane the reflection of Sunlight from them .

None of them give off light on their own account.

How are stars formed?

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Asked by Jessie Zieme

When stars inter into the red giant stage from the main-sequence stage, supergiant stars can form. The zone of hydrogen burning expands the star outward leaving an inert helium core. This outward movement causes hydrogen fusion in the outer shell of the star making the star thousands of times larger.

Why is 42 the answer to the universe?

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Asked by Wiki User

What is the greatest common factor of 42 and 84. Answer is 42.

What are the contribution of Chinese to astronomy?

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Asked by Wiki User

The Chinese astronomers generated fantastically accurate measurements of time and charted unusual cosmological phenomena, such

as novae, comets and meteor showers. This makes their work important to the development of the history of astronomy, and their ideas filtered down the Silk Road into the Middle East and Europe. Ancient Chinese kept records of a wide range of celestial events, including solar and lunar eclipses, sunspots, comets and meteors, guest stars (nova or supernova), planetary events, aurora borealis etc.

  1. as novae, comets and meteor showers. This makes their work important to the development of the history of astronomy, and their ideas filtered down the Silk Road into the Middle East and Europe.Ancient Chinese kept records of a wide range of celestial events, including solar and lunar eclipses, sunspots, comets and meteors, guest stars (nova or supernova), planetary events, aurora borealis etc.ealis etc.

Days and times of month moon changes shapes?

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Asked by Wiki User

The Moon is constanly changing shape, because it is orbiting the Earth. It is not STATIC in space.

However, at certain times its shape is given a name.

Day 1; New Moon ; Not seen because it is very close to the Sun (day time), Possible Solar Eclipse

Day 7 ; 1st. Quarter ; Half the circle of the Moon is seen .(evening)

Day 14 ; Full Moon ; A full lit disc is seen. (midnight). Possible Lunar Eclipse.

Day 21 ; Last Quarter ; The other half of the Moon is seen. ( Morning)

Day 28/28 ; Next New Moon.

Between day 1 - 7 it's shape is waxing crescent

Between day 7 - 14 it;'s shape is waxing gibbous

Day 14 - 21 it's waning gibbous

Day 21 - 28/9 it's shape is waning crescent.

NB In good clear weather conditions , when a crescent moon is seen , the ghost shape of the full moon's circle can be seen. In England ; it is said of 'The old moon with the new moon in her arms'.

What kind of ellipse occurs when the moon is between the earth and the moon?

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Asked by Wiki User

'Ellipse' ??? I think you mean 'Eclipse'.

First of all The Moon orbits the Earth in an 'Ellipsoidal fashion'. That is it is an ellipse that doesn't quite close up. Similarly, as a binary system the Earth and Moon orbit the Sun in a similar ellipsoidal fashion.

When the 'Moon is between the Earth and the Moon'. is a nonsense. I think you mean ,When the Moon is between the Earth and the Sun.'

In this case it is a Solar Eclipse, because the Sun(Solar) is being obscured. These do NOT occur at every New Moon, because the Moon's orbital plane abount the Earth is angled at 5 degrees to the Earth's orbital plane about the Sun. It is only when these two planes cross(intersect) at New Moon, that you have a Solar Eclipose. Similarly , for Lunar Eclipose.

NB ;Ellipse' is a flattened planar circle.

Eclipse is that something is being hidden.

What is Johannes Kepler favorite food?

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Asked by Wiki User

galileo's favorite food was girls on a stick

What type of reaction powers stars?

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Asked by Wiki User

It is thermo-nuclear fusion.

That is two atoms of hydrogen aredraw to each other by gravity. They become so close they fuse together and release energy in the process.

This happens billions of times over in a given locality in space, and as such a star forms.

How is the sun the earth and the moon positioned during the first quarter moon?

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Asked by Wiki User

They are at 'right-angles', with the Earth at the corner of the right angle.

Which quality makes Earth particularly well-suited to support life?

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Asked by Wiki User

It contains the right amount of carbon, nitrogen and oxygen. Its distance from the sun helps maintain a narrow temperature range. It has a strong magnetic field.

Earths precession resulted in an ice age that ended about how many years ago?

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Asked by Wiki User

In the last couple of million years, the Earth has experienced dozens of ice ages.

The last one ended about 15,000 years ago. We don't know if they are related at all

to the Earth's "precession", which is a 26,000-year-long "wobble" in the Earth's spin.

There is no reason for precession to have any effect on Earth's climate, since the

'tilt' of the axis remains constant throughout the cycle of precession.

What is long form of NGO?

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Asked by Wiki User

The full form of NGO is Non-Governmental Organization.

cryamerica.org/

What is celestial space objects can be meteoroid come from?

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Asked by Wiki User

The space rock is the celestial space object that a meteoroid comes from.

What planet's distance from the sun is about 72 percent of the distance from the sun to the earth?

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Asked by Wiki User

The distance between the Sun and the Earth is 1 AU (149.597 m km / 93 m miles) whereas the distance between the Sun and Venus is at an average of 0.723 AU (108. 200 m km / 67.625 m miles). So it can be called 72% of the Sun-Earth distance.

Is gravity a pushing force?

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Asked by Wiki User

No i dont fink

What do meteors smell like?

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Asked by Wiki User

They smell like acid and gun powder.

What did the Alien from outer space say to the green book?

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Asked by Wiki User

Lead me to your readers