The late-time spectra are strikingly similar to SN IIb 1993J, which is the only previous example clearly showing the same transition. This late-time evolution is fully explained by a change in the ...

The density structure and expansion velocities of SN 2013ai are similar to those of the prototypical SN IIb, SN 1993J. However, SN 2013ai shows no strong helium features in the optical, likely due to ...

et al., A Multiwavelength View of the Rapidly Evolving SN 2018ivc: An Analog of SN IIb 1993J but Powered Primarily by Circumstellar Interaction, ApJ, 942, 17 (01/2023) Martínez-Lombilla, C., et al., ...

A Standard Missile-3 is fired from a Vertical Launching System on Andersen Air Force Base, Guam as part of a Missile Defense Agency flight experiment December 10, 2024. Credit: DoD WASHINGTON ...

Shakira is shaking off a recent concert mishap. The “Waka Waka” singer took a spill onstage during a stop on her Las Mujeres Ya No Lloran Tour in Montreal, Canada, resulting in an unexpected ...

REYKJAVÍK, Iceland — The White House is withdrawing the nomination of Jared Isaacman to be administrator of NASA, throwing an agency already reeling from proposed massive budget cuts into ...

June 21, 2025: We're still defending the fort in the hopes of winning new Attack on Titan Revolution codes. What are the new Attack on Titan Revolution codes? There are many anime games on Roblox ...

June 21, 2025: We're looking out for new Azure Latch codes for the weekend. What are the new Azure Latch codes? Becoming the ultimate egoist takes far more than a few fancy tricks, though it doesn ...

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