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Tag: measure

Astronomers measure fastest non-lethal stellar blast in history

Astronomers measure fastest non-lethal stellar blast in history

Science
Aug. 2 (UPI) -- New measurements of Eta Carinae suggest the star system produced the fastest non-lethal stellar blast in history. Though the famed binary star system Eta Carinae exploded 170 years ago, scientists are still able to study the blast by measuring its light echoes. Light echoes are produced by light energy produced by stellar events bounce off and become redirected by distant gas clouds. Light echoes produced by the massive Eta Carinae -- witnessed by astronomers and laypeople alike during the mid-1800s -- continue to redirect toward Earth, allowing scientists to peer back into the annals of cosmic history. "A light echo is the next best thing to time travel," Nathan Smith, an astronomer at the University of Arizona, said in a news release. "That's why light echoes are so beau...
Scientists try to measure impact of pollution on animal behavior

Scientists try to measure impact of pollution on animal behavior

Science
July 27 (UPI) -- Scientists at the University of Plymouth are developing experiments and standards for quantifying the effects of pollution exposure on animal behavior. Researchers know animals are regularly exposed to toxic chemicals. They also know pollution exposure can alter behaviors related to survivability -- feeding, finding mates and avoiding predators. But measuring changes in behavior isn't easy. In a series of new experiments, scientists at Plymouth revealed potential flaws in traditional ways of measuring animal behavior. In a previous experiment, researchers showed amphipods, small crustaceans, swim away from pulses of light. They also found the animals like to swim near the tank wall in the lab. But as part of their most recent study, scientists showed the shape and size o...
Hubble, Gaia produce most precise measure of universe's expansion rate

Hubble, Gaia produce most precise measure of universe's expansion rate

Science
July 12 (UPI) -- By combining the observations of the two most powerful space telescopes in orbit, scientists have achieved the most precise measurement of the Hubble constant, the universe's expansion rate. The new measurement confirms the tension between explosion rate in the early and late universe, researchers report. Astronomers can measure the expansion of the universe by measuring a galaxy's redshift, a change in the wavelength of the light due to a change in the velocity of the object. By measuring the redshift of galaxies using the Hubble Telescope, scientists have established the Hubble constant. But investigations of the cosmic microwave background, the oldest radiation in the universe, can also be used to predict the universe's expansion rate. Maps of the microwave signature ...
Scientists measure whales' aversion to noise pollution

Scientists measure whales' aversion to noise pollution

Science
Aug. 17 (UPI) -- A new study has offered fresh insights into how whales are impacted by noise pollution.Researchers at the University of Queensland in Australia wanted to find out if "ramp-up sequences" allow whales to acclimate to foreign noise. Ramp-up sequences describe the use of softer sounds for 10 to 20 minutes prior to the introduction of louder noise levels.To find out, researchers subjected a pod of migrating humpback whales to a series of acoustic air guns, at different distances and decibel levels. The test results -- detailed this week in the journal Marine Pollution Bulletin -- suggest ramp-up sequences have no effect.Whales avoid noise pollution, whether it is preceded by ramp-up sequences or not.Air guns are frequently used by oil and gas drilling operations to map the ocea...
Oregon approves measure requiring insurers to cover abortion

Oregon approves measure requiring insurers to cover abortion

Health
Insurance companies in Oregon would be required to cover abortions and other reproductive services at no cost to the patient regardless of income, citizenship status or gender identity under a measure approved Wednesday by lawmakers. Oregon already has some of the most liberal abortion laws in the U.S., leaving out otherwise common requirements for waiting periods or spending limits on taxpayer funds. The measure, which does offer some religious-based exemptions, comes as the federal government and other states are seeking restrictions on abortion services. President Donald Trump earlier this year signed legislation allowing states to withhold federal family planning funds from Planned Parenthood and other abortion providers. In May, the Texas Legislature approved a sweeping package of ne...