We can’t understand what we can’t clearly see. That fact plagues scientists who study how planets form. Planet formation happens inside a thick, obscuring disk of gas and dust. But when it comes to seeing through that dust to where nascent planets begin to take shape, astronomers have a powerful new tool: the James Webb Space Telescope.
Continue reading “Webb Joins the Hunt for Protoplanets”Another Hycean Planet Found? TOI-270 d
Hycean planets may be able to host life even though they’re outside what scientists consider the regular habitable zone. Their thick atmospheres can trap enough heat to keep the oceans warm even though they’re not close to their stars.
Astronomers have found another one of these potential hycean worlds named TOI-270 d.
Continue reading “Another Hycean Planet Found? TOI-270 d”This Galaxy Was Already Dead When the Universe Was Only 700 Million Years Old
When a galaxy runs out of gas and dust, the process of star birth stops. That takes billions of years. But, there’s a galaxy out there that was already dead when the Universe was only 700 million years old. What happened to it?
Continue reading “This Galaxy Was Already Dead When the Universe Was Only 700 Million Years Old”JWST Sees a Milky Way-Like Galaxy Coming Together in the Early Universe
The gigantic galaxies we see in the Universe today, including our own Milky Way galaxy, started out far smaller. Mergers throughout the Universe’s 13.7 billion years gradually assembled today’s massive galaxies. But they may have begun as mere star clusters.
In an effort to understand the earliest galaxies, the JWST has examined their ancient light for clues as to how they became so massive.
Continue reading “JWST Sees a Milky Way-Like Galaxy Coming Together in the Early Universe”A New View of Uranus’ North Pole from JWST
One cool thing about Uranus is that its orientation, compared to the rest of the solar system, allows a unique perspective of the planet from our home planet. It is tilted at 98° compared to the rest of the ecliptic plane. So, when viewed from Earth, we can see its North Pole and its rings in some exceptional cases. That perspective is fully displayed in an image of Uranus recently released by the European Space Agency (ESA) and captured using the James Webb Space Telescope (JWST).
Continue reading “A New View of Uranus’ North Pole from JWST”Can Webb Find the First Stars in the Universe?
The Universe’s very first stars had an important job. They formed from the primordial elements created by the Big Bang, so they contained no metals. It was up to them to synthesize the first metals and spread them out into the nearby Universe.
The JWST has made some progress in finding the Universe’s earliest galaxies. Can it have the same success when searching for the first stars?
Continue reading “Can Webb Find the First Stars in the Universe?”JWST Finds the Smallest Free-Floating Brown Dwarf
Star formation is happening all around us in the Universe. However, there is still plenty we don’t know about it, including, as a recent press release points out, something that every astronomy textbook points out – we don’t know the size of the smallest star. Most current answers in those textbooks refer to an object known as a brown dwarf, a cross between a star and a giant planet. Recently, the James Webb Space Telescope (JWST) found what is believed to be the smallest brown dwarf ever discovered – and it weighs in at only 3-4 times the weight of Jupiter.
Continue reading “JWST Finds the Smallest Free-Floating Brown Dwarf”A Galaxy Only 350 Million Years Old Had Surprising Amounts of Metal
Astrophysicists working with the JWST have found a surprising amount of metal in a galaxy only 350 million years after the Big Bang. How does that fit in with our understanding of the Universe?
Continue reading “A Galaxy Only 350 Million Years Old Had Surprising Amounts of Metal”Astronomers Want JWST to Study the Milky Way Core for Hundreds of Hours
To understand the Universe, we need to understand the extreme processes that shape it and drive its evolution. Things like supermassive black holes (SMBHs,) supernovae, massive reservoirs of dense gas, and crowds of stars both on and off the main sequence. Fortunately there’s a place where these objects dwell in close proximity to one another: the Milky Way’s Galactic Center (GC.)
Continue reading “Astronomers Want JWST to Study the Milky Way Core for Hundreds of Hours”Feast Your Eyes on this Star-Forming Region, Thanks to the JWST
Nature is stingy with its secrets. That’s why humans developed the scientific method. Without it, we’d still be ignorant and living in a world dominated by superstitions.
Astrophysicists have made great progress in understanding how stars form, thanks to the scientific method. But there’s a lot they still don’t know. That’s one of the reasons NASA built the James Webb Space Telescope: to coerce Nature into surrendering its deeply-held secrets.
Continue reading “Feast Your Eyes on this Star-Forming Region, Thanks to the JWST”