In a press conference yesterday, NASA officials revealed the latest data from the Curiosity rover mission on Mars. The data shows that the Rover’s current location, at the base of Mount Sharp in the Gale Crater, was once deep underwater, part of a vast lake filling the entire crater. The results suggest that ancient Mars had a climate that could sustain large lakes across the planet over millions of years. “If our hypothesis for Mount Sharp holds up, it challenges the notion that warm and wet conditions were transient, local, or only underground on Mars,” said Ashwin Vasavada, Curiosity deputy...
Yesterday I wrote about young stars that had a habitable zone further away than we thought, and how this would help us spot habitable planets more easily in the future. Today is the second news story this week dealing with finding planets, and it deals with more familiar Sun-like stars and their dusty planetary discs. Dust is both a good thing and a bad thing when looking for planets orbiting other stars. Dust tells us that there is a high likelihood of finding planets, but too much dust blocks out the planets that we look for. Warm dust is worse...
It’s true, Mars just had what we call a Meteor Storm. This is an event that, on Earth, only happens once every few hundred years, and the one that Mars just had was more intense than anything Earth has experienced in recorded history. This event happened because of a close Martian fly-by of comet C/2013 A1 Sliding Spring. On October 19th around 2:30pm EDT the comet came within 140,000 Km of Mars. This is incredibly close in Astronomical terms, being less than half the distance to the Moon and comparable to the total distance I’ve driven my car in the...
I’ve seen a lot of lovely images from the Spitzer Space Telescope. It takes infrared images and can see the fine structure of galaxies, where stars are forming and where they are not forming. The photos paint a picture of the history and evolution of a galaxy. The latest image released last week shows some amazing features. The Cyan light in the image is a combination of blue and green coloured light representing infrared wavelengths of light at 3.4 and 4.5 microns. This wavelength shows the stellar population in the galaxy. The red light is representing dust features that glow...
