Newly Forming Stars Don’t Blast Away Material as Previously Believed. So Why Do They Stop Growing?

We thought we understood how stars are formed. It turns out, we don’t. Not completely, anyway. A new study, recently conducted using data from the Hubble Space Telescope, is sending astronomers back to the drawing board to rewrite the accepted model of stellar formation.

Continue reading “Newly Forming Stars Don’t Blast Away Material as Previously Believed. So Why Do They Stop Growing?”

The Core Of The Milky Way Is An Extreme Place

Astronomers always like to look at incredibly violent places.  Violence, in the astronomical sense, makes for rare conditions that can explain much about our universe.  One of the violent places that astronomers love to study is the center of our Milky Way galaxy.  Now, astronomers from the Center for Astrophysics (CfA) at Harvard have come up with a new catalogue of some of the most intense areas near the galactic core.  They hope it will increase our understanding of these potential star-forming regions – and help explain why so few stars are actually formed in them.

Continue reading “The Core Of The Milky Way Is An Extreme Place”

Astronomers Can Predict When a Galaxy’s Star Formation Ends Based on the Shape and Size of its Disk

A galaxy’s main business is star formation. And when they’re young, like youth everywhere, they keep themselves busy with it. But galaxies age, evolve, and experience a slow-down in their rate of star formation. Eventually, galaxies cease forming new stars altogether, and astronomers call that quenching. They’ve been studying quenching for decades, yet much about it remains a mystery.

A new study based on the IllustrisTNG simulations has found a link between a galaxy’s quenching and its stellar size.

Continue reading “Astronomers Can Predict When a Galaxy’s Star Formation Ends Based on the Shape and Size of its Disk”

The Universe in Formation. Hubble Sees 6 Examples of Merging Galaxies

Audio narration by the author is available above

10 billion years ago, galaxies of the Universe were ablaze with the light of newly forming stars. This epic phase of history is known as  “Cosmic Noon” – the height of all star creation. Galaxies like our Milky Way aren’t creating stars at nearly the rates they were in the ancient past. However, there is a time when galaxies in the present can explode with star formation – when they collide with each other. This recently published collage of merging galaxies by the Hubble HiPEEC survey (Hubble imaging Probe of Extreme Environments and Clusters) highlights six of these collisions which help us understand star formation in the early Universe.

Newly released collage of six galaxy mergers used in the HiPEEC survey.
Top Row Left to Right: NGC 3256, 1614, 4195 Bottom Row Left To Right: NGC 3690, 6052, 34
– Credit ESA/Hubble/NASA
Continue reading “The Universe in Formation. Hubble Sees 6 Examples of Merging Galaxies”

This is a Simulation of the Interstellar Medium Flowing Like Smoke Throughout the Milky Way

How do stars form?

We know they form from massive structures called molecular clouds, which themselves form from the Interstellar Medium (ISM). But how and why do certain types of stars form? Why, in some situations, does a star like our Sun form, versus a red dwarf or a blue giant?

That’s one of the central questions in astronomy. It’s also a very complex one.

Continue reading “This is a Simulation of the Interstellar Medium Flowing Like Smoke Throughout the Milky Way”

Astronomers See a Newly Forming Planetary Disk That’s Continuing to Feed On Material from its Nebula

Over the last few years, astronomers have observed distant solar systems in their early stages of growth. ALMA (Atacama Large Millimeter/submillimeter Array) has captured images of young stars and their disks of material. And in those disks, they’ve spotted the tell-tale gaps that signal the presence of growing young planets.

As they ramped up their efforts, astronomers were eventually able to spot the young planets themselves. All those observations helped confirm our understanding of how young solar systems form.

But more recent research adds another level of detail to the nebular hypothesis, which guides our understanding of solar system formation.

Continue reading “Astronomers See a Newly Forming Planetary Disk That’s Continuing to Feed On Material from its Nebula”

Planets Don’t Wait for Their Star to Form First

It looks like we may have to update our theories on how stars and planets form in new solar systems. A team of astronomers has discovered young planets forming in a solar system that’s only about 500,000 years old. Prior to this discovery, astronomers thought that stars are well into their adult life of fusion before planets formed from left over material in the circumstellar disk.

Now, according to a new study, it looks like planets and stars can form and grow up together.

Continue reading “Planets Don’t Wait for Their Star to Form First”