NASA’s Hubble Telescope saw a gigantic, exploding star disappear into the void

Hubble observed a supernova on the outer edge of spiral galaxy NGC 2525. 


NASA, ESA, and A. Riess (STScI/JHU) and the SH0ES team Acknowledgment: M. Zamani (ESA/Hubble)

Titanic, runaway thermonuclear explosion. A disappearing act. Nature’s atomic bomb. NASA sure knows how to describe a supernova, the final moments of a star’s existence.

Seventy-million light-years away in the scenic spiral galaxy NGC 2525, a white dwarf exploded and the Hubble Space Telescope witnessed its last days. NASA and the European Space Agency, which jointly run Hubble, released a rare time-lapse of the supernova’s fading brightness. 

The space telescope first started watching the supernova, named SN 2018gv, in February 2018. The time-lapse covers almost a year of Hubble observations.

The supernova initially outshone the other stars in its host galaxy. “When a star unleashes as much energy

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NASA’s Hubble Telescope sees huge exploding star disappear into the void

Titanic, runaway thermonuclear explosion. A disappearing act. Nature’s atomic bomb. NASA sure knows how to describe a supernova, the final moments of a star’s existence.



a star filled sky: Hubble observed a supernova on the outer edge of spiral galaxy NGC 2525. NASA, ESA, and A. Riess (STScI/JHU) and the SH0ES team Acknowledgment: M. Zamani (ESA/Hubble)


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Hubble observed a supernova on the outer edge of spiral galaxy NGC 2525. NASA, ESA, and A. Riess (STScI/JHU) and the SH0ES team Acknowledgment: M. Zamani (ESA/Hubble)

Seventy-million light-years away in the scenic spiral galaxy NGC 2525, a white dwarf exploded and the Hubble Space Telescope witnessed its last days. NASA and the European Space Agency, which jointly run Hubble, released a rare time-lapse of the supernova’s fading brightness. 

The space telescope first started watching the supernova, named SN 2018gv, in February 2018. The time-lapse covers almost a year of Hubble observations.

The supernova initially outshone the other stars in its host galaxy. “When a star unleashes as much energy in a matter of days as our sun does in several

Read More

App bans won’t make US security risks disappear

Will the US government ban TikTok and WeChat, or won’t it—and why? With the Trump administration issuing vaguely phrased executive orders and policies about the apps, even as legal challenges against potential bans move through the courts and the president gives his “blessing” to a deal to keep TikTok in US app stores, it’s hard to make out a coherent story.

The Trump administration’s actions against the two Chinese-owned social-media platforms are driven more by politics and an effort to seem tough on China than by actual privacy, safety, or national security concerns. However, that doesn’t mean there aren’t tough challenges ahead in regulating digital platforms based in China, the United States, or anywhere else.

As the TikTok and WeChat stories unfold—and no one should expect a permanent resolution anytime soon—policymakers, technologists, and citizens should look beyond this chaotic start to the deeper, unresolved questions. Now is the time to

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