Radio telescopes measure the galaxy’s distribution of . photons from the sun X-rays given off by black holes dust ejected from asteroid impacts on other planets hydrogen from which stars are formed

Which sequence of transformations on preimage ∆abc will not produce the image ∆a'b'c'? a. reflection across the line y = x b. rotation 180° clockwise about the origin followed by a reflection across the line y = -x c. reflection across the x-axis followed by a reflection across the y-axis d. reflection across the line y = -x followed by a rotation 180° counterclockwise about the origin e. reflection across the y-axis followed by a rotation 90° clockwise about the origin

Which season occurs in the northern hemisphere when the sun is at its lowest point in the sky

Where the main factor that enabled the growth of cities and civilizations was the existence of