{"id":22016,"date":"2026-05-22T04:55:19","date_gmt":"2026-05-22T08:55:19","guid":{"rendered":"https:\/\/www.ecoportal.net\/en\/?p=22016"},"modified":"2026-05-21T11:42:39","modified_gmt":"2026-05-21T15:42:39","slug":"supernova-seen-five-times","status":"publish","type":"post","link":"https:\/\/www.ecoportal.net\/en\/supernova-seen-five-times\/22016\/","title":{"rendered":"Astronomers spent six years chasing a cosmic miracle until they found a supernova so rare it appeared five times at once in the same sky"},"content":{"rendered":"

Astronomers spent nearly six years searching for what they called a “cosmic ghost”<\/strong>.<\/p>\n

Late August 2025 is when the Zwicky Transient Facility in California caught it.<\/p>\n

A distant star died in one violent blast. But somehow, that same explosion appeared five times<\/strong>.<\/p>\n

The probability of seeing something like this was minuscule.<\/p>\n

How can one identical event<\/strong> be seen as many times as five?<\/p>\n

How one supernova exploded five separate times<\/h2>\n

A supernova is flashing us from an incomprehensible 10 billion light-years away.<\/p>\n

Equally amazing is that it’s been doing so since the universe was four billion years old<\/strong>.<\/p>\n

In theory, there’s no land-based telescope on Earth that should even be able to see this.<\/p>\n

Fronting the blast were two masses that caused a unique phenomenon<\/strong>. <\/p>\n

The result was a series of images combining to create an eerie cosmic cross.<\/p>\n

And it turns out, Albert Einstein already predicted this 100 years ago<\/strong>.<\/p>\n

\"\"
Cassiopeia A (Cas A) supernova remnant seen by the NASA\u2019s Chandra X-ray Observatory – X-ray: NASA\/CXC\/Meiji Univ.\/T. Sato et al.; Image Processing: NASA\/CXC\/SAO\/N. Wolk<\/figcaption><\/figure>\n

The superluminous variant of supernovae are already incredibly rare. The special quality of light they emit is a<\/strong> factor of hundreds greater than ordinary supernovas<\/strong>.<\/p>\n

Until now, no one had ever seen a superluminous supernova magnified and split at the same time.<\/p>\n

A six-year endeavor to facilitate flawless alignment<\/h2>\n

It took the dedicated research team six years to find candidate lenses. The alignment had to be perfect.<\/p>\n

In August 2025, it finally happened<\/strong>.<\/p>\n

The superluminous supernova, SN Winny’s explosion was first captured by the Californian Zwicky Transient Facility.<\/p>\n

The Nordic Optical Telescope was commandeered <\/a>for early spectroscopy.<\/p>\n

Crucially, four extra images were delivered by the Liverpool Telescope<\/strong>.<\/p>\n

And finally, Keck Observatory contributed the next night’s data, being the last piece to complete the five-point puzzle.<\/p>\n

Shock rippled through the W.M. Keck Observatory<\/a>.<\/p>\n

One supernova exploded \u2013 producing five separate paths of light<\/strong>.<\/p>\n

Two gravitating lensing galaxies barred the way between the explosion and Earth, and their incredible mass warped spacetime.<\/p>\n

The light was forced to take curved paths<\/strong> around them.<\/p>\n

But the catch was, each of these routes was slightly longer. Naturally, the shortest route brought light to Earth first.<\/p>\n

It would take years<\/strong> for the longest to get here.<\/p>\n

Can one star explode five times? The physics behind the phenomenon<\/h2>\n

Timing differences allow researchers to determine<\/a> the expansion rate of the universe<\/strong>. <\/p>\n

Astronomers track this via a single number: the Hubble Constant.<\/p>\n

The cosmic distance ladder<\/strong> calculates distances to galaxies near us by measuring objects step-by-step.<\/p>\n

Due to the accumulation of small errors at each step, systematic uncertainty accumulates rapidly.<\/p>\n

The cosmic microwave background<\/strong> analyzes the universe at the beginning of time directly.<\/p>\n

This depends on the assumptions we’ve made about the unfolding of the universe.<\/p>\n

Results vary by several percent, which we call the Hubble tension. This poses a challenge to the standard model of cosmology<\/strong>.<\/p>\n

Gravitational lensing is a third method<\/a>.<\/p>\n

Delays between images rely on the mass of the lens and the expansion<\/strong> of the universe.<\/p>\n

Unlike the distance ladder, this method utilizes a single measurement.<\/p>\n

Errors tend to snowball<\/strong>, throwing off the final calculation.<\/p>\n

The Large Binocular Telescope in Arizona produced the first high-resolution color image of Supernova Winny (SN 2025WNY).<\/p>\n

Two galaxies in the foreground managed to warp spacetime to create a cosmic replay<\/strong>. This multiplied a single explosion into five blue echoes.<\/p>\n

The chances of capturing a superluminous supernova perfectly aligned with a dual-galaxy lens is a <\/span>one-in-a-million shot.<\/span><\/p>\n

And most lensed systems create either two or four images. Five is uncommon.<\/strong><\/p>\n

What’s next for cosmic mapping?<\/h3>\n

Smoothness increases the accuracy of measurements.<\/p>\n

Hubble and Webb are racing to capture precision maps at extreme angles<\/strong> before the light fades.<\/p>\n

Vera C. Rubin Observatory will begin scanning the entire sky systemically.<\/p>\n

We expect that this massive sky-scanning facility is expected to unlock hundreds more lensed supernovae<\/strong>.<\/p>\n

Magnification will reveal how galaxies formed<\/a> when the universe was young.<\/p>\n

How much of what we see in the night sky is exactly as it appears, and how much is just a beautiful trick of the lens<\/strong>?<\/p>\n","protected":false},"excerpt":{"rendered":"

Astronomers spent nearly six years searching for what they called a “cosmic ghost”. Late August 2025 is when the Zwicky Transient Facility in California caught it. A distant star died in one violent blast. But somehow, that same explosion appeared five times. The probability of seeing something like this was minuscule. How can one identical … Read more<\/a><\/p>\n","protected":false},"author":27,"featured_media":22064,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"rank_math_focus_keyword":"supernova, appeared","rank_math_title":"","rank_math_description":"A rare supernova appeared five times in the sky, giving scientists a new way to measure how fast the universe is expanding for the first time ever today.","footnotes":""},"categories":[26],"tags":[],"class_list":["post-22016","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-space"],"_links":{"self":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts\/22016","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/users\/27"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/comments?post=22016"}],"version-history":[{"count":0,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts\/22016\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/media\/22064"}],"wp:attachment":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/media?parent=22016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/categories?post=22016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/tags?post=22016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}