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Thanks to data from a magnified, multiply imaged supernova, a team led by University of Minnesota Twin Cities researchers has successfully used a first-of-its-kind technique to measure the expansion rate of the universe. Their data provide insight into a longstanding debate in the field and could help scientists more accurately determine the universe’s age and better understand the cosmos.

The work is divided into two papers, respectively published in Science and The Astrophysical Journal.

In astronomy, there are two precise measurements of the expansion of the universe, also called the “Hubble constant.” One is calculated from nearby observations of supernovae, and the second uses the “cosmic microwave background,” or radiation that began to stream freely through the universe shortly after the Big Bang.

Astrophotographer Andrew McCarthy has captured a “GigaMoon” — a 1.3-gigapixel highly-detailed image of the Moon made from 280,000 photos.

It’s an image that McCarthy has wanted to capture for a long time, with multiple attempts thwarted by poor conditions.

The object’s gravity and velocity, the study suggested, would have ignited the gas and left a blazing trail of stars in its wake. This exciting discovery would mark the first observation of a rogue supermassive black hole — objects that are theorized to roam the universe after being ejected from their host galaxy, possibly due to collisions with other black holes.

Now, new research hints at a more mundane explanation.

The new study, published in the journal Astronomy & Astrophysics (opens in new tab), suggests that the weirdly thin streak might simply be a flat galaxy viewed on its edge, like the rim of a plate. Unlike the Milky Way, this supposed galaxy would not have a bulge of stars at its center but would be totally flat — a relatively common type of galaxy called a thin or flat galaxy.

Lurking in the darkness of space, black holes are notorious for shredding stars that venture too close, and then gobbling them up. But astronomers have had only a rudimentary understanding of that dramatic process.

A new study sheds some light. Astronomers have spotted streams of star matter that came full circle around black holes and bumped into themselves. Such collisions were long theorized, but the new observations for the first time provide a direct look at the early stages of disk-forming around black holes.

Making a wormhole that a human could theoretically travel through would require an upside-down universe and negative energy.

By Jon Cartwright

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A new way to gauge the universe’s expansion rate has delivered a confusing result that may conflict with previous related measurements.

Researchers have discovered a new generic production mechanism of gravitational waves generated by a phenomenon known as oscillons, which can originate in many cosmological theories from the fragmentation into solitonic “lumps” of the inflaton field that drove the early universe’s rapid expansion, reports a new study published in Physical Review Letters on May 2.

The results have set the stage for revealing exciting novel insights about the universe’s earliest moments.

The inflationary period, which occurred just after the Big Bang, is believed to have caused the universe to expand exponentially. In many cosmological theories, the rapid expansion period is followed by the formation of oscillons.

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