Why do blue stragglers stand out in globular clusters?

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They are much bluer and apparently younger than the evolved red giants that are the brightest stars in these old clusters. Apparently they are the result of mergers between stars in the dense globular clusters.

Physics & Space Science

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The size of the gravitational force that Earth exerts on the Moon is ____ that the Moon exerts on Earth.

A. greater than B. the same as C. smaller than

Physics & Space Science

From the South Pole, Polaris would appear directly overhead

Indicate whether the statement is true or false

Physics & Space Science

Two extremely flat glass plates, 10.0 cm wide, touch at one end but are separated by a thin wire at the other end, forming a wedge

Light with a wavelength of 450 nm shines almost perpendicularly on the glass and forms fringes which are 1.80 mm apart. What is the diameter of the wire? A) 25.0 µm B) 10.0 µm C) 20.0 µm D) 12.5 µm E) 17.5 µm

Physics & Space Science

The mass of an atom of carbon-12 (Z = 6) is less than the mass of 6 protons and 6 neutrons because of __________

Fill in the blank(s) with correct word

Physics & Space Science