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The time until Betelgeuse explodes depends on the predicted initial conditions and on the estimate of the time already spent as a red supergiant. The total lifetime from the start of the red supergiant phase to core collapse varies from about 300,000 years for a rotating 25 M ☉ star, 550,000 years for a rotating 20 M ☉ star, and up to a ...
About twelve hours after the explosion, Betelgeuse sank at her moorings in 40 m (130 ft) of water, which largely extinguished the main body of the fire. [9] In spite of this, rescue workers were not able to approach the wreck (the bow of which was still above water) for a fortnight due to clouds of toxic and flammable gas surrounding it. When ...
Extending the extinction law into the mid-infrared wavelength range is difficult due to the lack of suitable targets and various contributions by absorption features. [14] R(V) compares aggregate and particular extinctions. It is A(V)/E(B−V). Restated, it is the total extinction, A(V) divided by the selective total extinction (A(B)−A(V)) of ...
Humanity has marveled at the vivid star Betelgeuse for many millennia. Over two thousand years ago, this imperious red object in the constellation Orion caught the eye of the Roman poet Horace:But ...
If the expansion occurs too close to the surface the restoring force will be too weak to create a pulsation. The restoring force to create the contraction phase of a pulsation can be pressure if the pulsation occurs in a non-degenerate layer deep inside a star, and this is called an acoustic or pressure mode of pulsation, abbreviated to p-mode.
While satellites and offshore buoys can inform scientists about marine heat waves, the effects on ocean species are less understood. Skip to main content. Sign in. Mail. 24/7 Help ...
The temperature of the deep ocean drops gradually with depth. As saline water does not freeze until it reaches −2.3 °C (27.9 °F) (colder as depth and pressure increase) the temperature well below the surface is usually not far from zero degrees. [2] The thermocline varies in depth.
The marine heat wave in the Gulf of Mexico could continue to influence the weather into the upcoming hurricane season. "The overall weather pattern combined with the warm waters could spin up a ...