What are mysterious cosmic objects shining brighter than the sun?

They produce way more energy than the sun and appear to break a physical boundary called the Eddington limit - now scientist found a possible explanation.

Swift X-ray observations of galaxy NGC 5408 indicate its ultraluminous X-ray source undergoes periodic changes every 115.5 days. This cycle, astronomers suspect, is linked to the orbit of a donor star around a middleweight black hole, as shown in this artist's view.

Swift X-ray observations of galaxy NGC 5408 indicate its ultraluminous X-ray source undergoes periodic changes every 115.5 days. This cycle, astronomers suspect, is linked to the orbit of a donor star around a middleweight black hole, as shown in this artist's view.

(photo credit: NASA/PUBLIC DOMAIN/VIA WIKIMEDIA COMMONS)

ByJERUSALEM POST STAFF

APRIL 14, 2023 22:29

RECOMMENDED STORIES

An illustrative image of the silhouettes of Iranian Supreme Leader Ali Khamenei and Israeli Prime Minister Benjamin Netanyahu set to a backdrop of their respective countries' flags.

Iranian official claims Israel used 'the occult and supernatural spirits' during 12-day war

JULY 13, 2025

Jpost_Image

Israel and US plan joint $200 million quantum fund, eyeing collaboration with UAE and Saudi Arabia

JULY 13, 2025

IDF troops operate on Mount Hermon in Syria, May 5, 2025.

IDF strikes Syrian tanks that advanced towards sectarian violence, near Israel's border

JULY 14, 2025

An illustrative image of an asteroid near the Earth.

Asteroid the size of 145 Elmos to fly past Earth on Tuesday, July 15 - NASA

JULY 14, 2025

Hot Opinion

Syria must demonstrate capacity to govern effectively if seeking peace with Israel

ByJPOST EDITORIAL

Zvika Klein

Rabbis and Netanyahu’s draft‑exemption monster rips at Israel’s coalition

Israeli-Syrian security arrangement: A new model of normalization?

No mercy: Israel’s tactics in confronting terror

BySALEM ALKETBI