The Sun Flashcards

1
Q

What mission is approaching the sun?

A

The Parker Solar Probe

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2
Q

How many stars other than the sun are in our solar system?

A

Zero

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3
Q

What does the sun provide?

A

Light and heat.

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4
Q

Is the sun a special star?

A

Only to us.

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5
Q

What does heat from the Sun’s core do as it moves outwards?

A

It cools.

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6
Q

How hot is the core of the sun?

A

27,000,000 degrees Fahrenheight.

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7
Q

How hot is the visible surface of the sun?

A

10,000 degrees Fahrenheight.

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8
Q

What is a coronal mass ejection?

A

When there’s a solar flare, followed by high energy particles that travel at half the speed of light.

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9
Q

What causes space weather events?

A

The Sun.

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10
Q

How can you measure activity on the Sun?

A

Count sunspots.

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11
Q

What does having a lot of sunspots mean?

A

The sun is more active.

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12
Q

What are sunspots?

A

Dark spots on the sun.

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13
Q

What happens if you look at sunspots in ultraviolet light?

A

They appear bright and active.

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14
Q

What is the solar maximum and minimum?

A

The solar maximum is most amount of sunspots and the solar minimum is the least amount of sunspots.

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15
Q

How long does a full solar cycle take?

A

Eleven years.

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16
Q

What comes after a coronal mass ejection?

A

A big blob of plasma.

17
Q

What does the big blob of plasma given off in coronal mass ejections do when it enters Earth’s atmosphere?

A

It causes aurora.

18
Q

What, put simply, is aurora?

A

An electrical current in the air.

19
Q

What happens if the ground doesn’t conduct for aurora?

A

It might flow through power grids, or pipelines, and cause power outages.

20
Q

What does aurora increase in Earth’s atmosphere?

A

The radiation belt.

21
Q

What problems can space weather cause?

A

Damaging spacecraft and affecting GPS.

22
Q

How does having no magnetic field affect Mars when it comes to space weather?

A

The radiation effects are direct.

23
Q

How does the blob of plasma enter Earth’s atmosphere?

A