Space and astronomy news
Time is relative, as they say, particularly for mid-day meals. As special relativity shows, the measure of any two clocks depends on their motion relative to each other. The greater their relative speed, the slower each clock is relative to each other. So, since we see distant galaxies speeding away from us, we should also see time move more slowly. Right?
Continue reading “The Early Universe Ran in Slow Motion”
On Saturday, July 1st (Canada Day!), the ESA’s Euclid space telescope lifted off from Cape Canaveral in Florida. This next-generation astrophysics mission will spend the next few weeks flying to the Earth-Sun L2 Lagrange Point, where it will spend the next six years observing one-third of the sky. During that time, Euclid will observe billions of galaxies to a distance of 10 billion light-years, leading to the most extensive 3D map of the Universe ever created. This map will help astronomers and cosmologists resolve the lingering mystery of Dark Matter and Dark Energy (DM & DE).
Continue reading “ESA's Euclid Mission is Off to Explore the Dark Universe”
The James Webb Space Telescope (JWST) has accomplished some amazing things during its first year of operations! In addition to taking the most detailed and breathtaking images ever of iconic celestial objects, Webb completed its first deep field campaign, turned its infrared optics on Mars and Jupiter, obtained spectra directly from an exoplanet’s atmosphere, blocked out the light of a star to reveal the debris disk orbiting it, detected its first exoplanet, and spotted some of the earliest galaxies in the Universe – those that existed at Cosmic Dawn.
Well, buckle up! The Space Telescope Science Institute (STScI) has just announced what Webb will be studying during its second year of operations – aka. Cycle 2! According to a recent STScI statement, approximately 5,000 hours of prime time and 1,215 hours of parallel time were awarded to General Observer (GO) programs. The programs allotted observation time range from studies of the Solar System and exoplanets to the interstellar and intergalactic medium, from supermassive black holes and quasars to the large-scale structure of the Universe.
Continue reading “James Webb is a GO for Cycle 2 Observations!”
NASA is building its first-ever robotic lunar rover. Named VIPER (Volatiles Investigating Polar Exploration Rover), the rover is set for launch in late 2024. But the terrain it will find when it reaches the Moon is impossible to predict. A series of tests carried out this spring are helping engineers understand the rover’s limits, and will ensure that VIPER can disembark from its lander even on extremely uneven terrain.
Continue reading “NASA's VIPER Rover's First Moments on the Moon Might Be its Most Terrifying”
Gravitational waves don’t travel through space and time. They are ripples in the fabric of spacetime itself. This is why they are so difficult to detect. We can only observe them by closely watching how objects bent and stretched within spacetime. But despite their oddness, gravitational waves behave in many of the same ways as light, and astronomers can use that fact to study cosmic expansion.
Continue reading “Gravitational Waves Can Be Gravitationally Lensed, and This Could Provide Another Way to Measure the Expansion of the Universe”
The Cosmic Web is the large-scale structure of the Universe. If you could watch our cosmos unfold from the Big Bang to today, you’d see these filaments (and the voids between them) form throughout time. Now, astronomers using JWST have found ten galaxies that make up a very early version of this structure a mere 830 million years after the Universe began.
Continue reading “JWST Sees the Beginning of the Cosmic Web”
On June 25, 2023, a crew of four volunteers entered a simulated Martian habitat, from which they will not emerge for over a year. Their mission: to learn more about the logistics – and the human psychology – of living long-term on another planet, without ever leaving the ground.
Continue reading “NASA Locks Four Volunteers Into a One-Year Mission in a Simulated Mars Habitat”
Gravitational astronomy is a relatively new discipline that has opened many doors for astronomers to understand how the huge and violent end of the scale works. It has been used to map out merging black holes and other extreme events throughout the universe. Now a team from Cal Tech’s Walter Burke Institute for Theoretical Physics thinks they have a new use for the novel technology – constraining the properties of dark matter.
Continue reading “Next Generation Gravitational Wave Detectors Could Pin Down Dark Matter”
The Sun is going to kill us. Not anytime soon, but it will kill us. At the moment the Sun keeps itself going by fusing hydrogen into helium and other heavier elements, but in five or so billion years it is going to run out of hydrogen. When that happens, the Sun will make a desperate attempt to keep going by fusing helium. During this period it will swell to a red giant, likely so large that it engulfs the Earth, baking it to a crisp in its diffuse hot atmosphere.
Continue reading “A Planet Was Swallowed by a Red Giant, But it Survived”
The pareidolia crowd is sure to have a field day with this! Once again, an oddly-shaped rock has been spotted on Mars. Once again, the rock is donut-shaped. This particular rock was spotted by NASA’s Perseverance rover, which continues to explore the Jezero Crater in Mars’ northern hemisphere. The image was taken by the Remote Microscopic Imager (RMI), part of the SuperCam instrument, at a distance of about 100 meters (328 feet) from the rover, on June 22nd, 2023 – the 832nd Martian day (or sol) of the mission.
Continue reading “Mmm. Perseverance Finds a Doughnut-Shaped Rock on Mars.”