Science, Space and Technology News 2024
This image from NASA’s James Webb Space Telescope’s NIRCam of the star-forming region NGC 604 shows how stellar winds from bright, hot young stars carve out cavities in surrounding gas and dust. Credit: NASA, ESA, CSA, STScIIn the astronomy field, the term “nearby” is quite relative. Neighboring galaxies to our home galaxy, the, are a few million light-years away. In contrast, some of the most distant galaxies ever detected, closer to the, are billions of light-years away.
, 2.73 million light-years away from Earth. In these images, cavernous bubbles and stretched-out filaments of gas etch a more detailed and complete tapestry of star birth than seen in the past.Sheltered among NGC 604’s dusty envelopes of gas are more than 200 of the hottest, most massive kinds of stars, all in the early stages of their lives. These types of stars are B-types and O-types, the latter of which can be more than 100 times the mass of our own Sun.
The bright orange-colored streaks in the Webb near-infrared image signify the presence of carbon-based molecules known as polycyclic aromatic hydrocarbons, or PAHs. This material plays an important role in the interstellar medium and the formation of stars and planets, but its origin is a mystery. As you travel farther from the immediate clearings of dust, the deeper red signifies molecular hydrogen. This cooler gas is a prime environment for star formation.
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