spiral nebula

Hubble also used Leavitt’s Cepheid variable technique to measure cosmic distances, this time by finding the variable stars in the spiral nebulae themselves.

Curtis was an older, well-respected authority on spiral nebulae, as well as a gifted speaker.

The now-convicted felons will hear their sentences in January, but their story continues to spiral downward.

This downward spiral involving local power politics was obvious to the Americans in the valley.

Without those subsidies, the worst-case scenario has Obamacare entering a fiscal death spiral.

To his fellow survivors and to the audience, this delusion indicates another slip on a downward spiral.

In 2008, it was looking at a death spiral: cut credit ratings, claims on the policies, and collateral calls.

And yet there are millions of stars whose distances are even greater than the distance of the Great Nebula in Orion.

The organism is an actively motile spiral thread, about four times the diameter of a red corpuscle in length.

See that silver spiral going out from Venus and around the table to the orbit of Saturn?

Spirochte pallida is an extremely slender, spiral, motile thread, with pointed ends.

Upon ulcerated surfaces it is often mingled with other spiral micro-organisms, which adds to the difficulty of its detection.