These needles in the vast galactic haystack take more effort to find, but they help piece together our origins.
- With billions of stars in our galaxy, why should astronomers seek out the oldest ones?
- Age-dating stars is a complicated process, so astronomers use chemical compositions, telescopes, and prisms to determine the age of these ancient stars.
- Some telescopes used for this purpose are in extremely remote places, where you can observe the bright band of the Milky Way with the naked eye.
What happens after a heavy comet meal?
- A comet produces and unexpected explosive ejection of ice, dust, and gas.
- NASA's TESS satellites captures the whole thing by accident.
- The "burp" may have left a crater 65 feet across. That's quite a burp.
An Oxford scientist claims a Nobel-Prize-winning conclusion is wrong.
- Paper by Oxford University physicist Subir Sarkar and his colleagues challenges how conclusions about cosmic acceleration and dark energy were reached.
- Physicists who proved cosmic acceleration shared a Nobel Prize.
- Sarkar used statistical analysis to question key data, but his methodology also has detractors.
An Oxford scientist's controversial theory rethinks dark matter and dark energy.
- An astrophysicist and cosmologist Dr. Farnes published a paper while at Oxford University with a novel explanation for dark energy and dark matter.
- His theory claims to explain the missing 95% of the observable universe by the existence of "dark fluid".
- This fluid has negative mass, repelling other materials.
NASA astronomer Michelle Thaller explains what astronomers actually do, and how can you become one.
- What's the difference between an astronomer and an astrophysicist? NASA's Michelle Thaller explains that these terms are used interchangeably: both are physicists who study objects and phenomena in the sky.
- How can you become an astronomer? There is a defined path to take: Do an undergrad degree in astrophysics, physics, mathematics or computer science, then complete a doctorate in astrophysics. You could also work with astronomers by studying engineering and building telescopes.
- In this fascinating explanation of what an astronomer's day-to-day job actually looks like, Thaller shines a light on the unexpected skills you might need and answers the question on every ambitious astronomer-to-be's mind: How will I know what to discover?