New research by Dr Ashok K. Singal suggests that the solar system is hurtling through space at a speed much higher than previously thought. The newly calculated speed might prove that the universe is not uniform on a large scale, as is portrayed by the cosmic microwave background radiation (CMBR), thermal radiation emitted shortly after the Big Bang.
The CMBR is not precisely uniform in all directions because the universe itself is not uniform. As our galaxy sweeps through the CMBR, this relative movement makes the sky look slightly hotter in the direction we are travelling. A tiny difference in CMBR temperature between two opposite directions in the sky previously suggested that the solar system has a speed of around 369 km/s. . However, few studies have investigated the irregularity in sky brightness due to radio emission from distant galaxies.
The researchers consulted 1.8 million radio sources from the US-based National Radio Astronomy Observatory VLA Survey catalogue while excluding radio signals coming from local cluster of galaxies known as the Virgo supercluster. The researchers considered what velocity would be required for an observer to detect irregularities in sky brightness matching those on Earth. They found that this velocity — the velocity of the solar system — is around four times that previously thought.
"The implication of this research is serious because any such anomaly implies anisotropy on a universal scale," says lead researcher Ashok K. Singal.
This would violate the cosmological principle, in which the isotropy of the universe is assumed for all epochs, he adds.
SOURCES: Singal, A. K. : ``Large peculiar motion of the solar system from the dipole anisotropy in sky brightness due to distant radio sources'' Astrophys. J. Lett. 742, L23 (2011)
- PHYSICAL SCIENCES
- EARTH SCIENCES
- LIFE SCIENCES
- SOCIAL SCIENCES
Subscribe to the newsletter
Stay in touch with the scientific world!
Know Science And Want To Write?
- LAWS And The Autonomy Of Killer Robots
- Screen For Celiac Disease In High-Rsk Groups Such As Diabetics, Anemics And Down's Syndrome
- Columbia's Lame Oz Defense
- Are Insects The Future Of Food?
- Sorry Star Trek Fans, Tau Ceti Is Not The Next Earth
- 5X: Alarming Rise In Cost Of Multiple Sclerosis Drugs Over 20 Years
- Household Pets Can Transmit Infections To People
- "Joe- I would have a much easier time responding to you had you written in English, but I'll do..."
- "Interesting. If he were simply anti-GMO, he could plausibly be a doctor still. Medicine, as a profession..."
- "Ha! Quite nice. There is a lot of wisdom in Di Maggio's words. But I would bet a dime that the..."
- "As the legendary baseball player Joe DiMaggio aged and his athletic legacy was secure, people asked..."
- "Too bad, I will continue to use it.T...."
- Wear goggles: Children's eye injuries from airsoft guns up sharply
- Tidal tugs on Teflon faults drive slow-slipping earthquakes
- Low birth rate: Claims about the decline of the West are exaggerated
- High-pitched sounds cause seizures in old cats
- Unexplained gap in global emissions of potent greenhouse gases solved