Articles on Astronomy

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This is a James Webb Space Telescope image of NGC 604, a star-forming region about 2.7 million light-years from Earth. NASA/ESA/CSA/STScI

How can the James Webb Space Telescope see so far?

The James Webb Space Telescope has 2 powerful instruments that see light the human eye can’t.
A simulation of a set of synthetic galaxies. Photons are sampled from these galaxies and have been simulated through the Earth’s atmosphere, a telescope and a sensor using a code called PhoSim. John Peterson/Purdue

Astronomy has a major data problem – simulating realistic images of the sky can help train algorithms

To make a truly realistic fake picture of a galaxy, you can model exactly how light particles travel through the atmosphere and telescope to reach its sensor.
In space, there are four dimensions: length, width, height and time. scaliger/iStock/NASA via Getty Images Plus

Where is the center of the universe?

As the universe expands, it feels like it must be spreading out from some initial point. But a physicist explains why that’s not how it works. Hint: space-time is involved.
One of the galaxies mapped by WALLABY: the red shade shows the atomic hydrogen gas content of the galaxy, overlaid on an optical image showing the stars. Much of it is typically found beyond the stellar disk (thin white line), where star formation takes place. Legacy Surveys / D. Lang (Perimeter Institute) / T. Westmeier

For making stars, it’s not just how much gas a galaxy has that matters – it’s where it’s hiding

A new, more detailed study of 1,000 distant galaxies explains why some gas-rich galaxies don’t produce as many stars as you’d expect.

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