A Ridiculously Huge Pair of Ancient Galaxies

Astronomers have discovered a pair of massive galaxies from the early universe, challenging existing models of galaxy formation. These galaxies, observed using gravitational lensing, are embedded in significant amounts of dark matter. Meanwhile, NASA's Opportunity Rover has survived its eighth Martian winter, despite challenges like dust storms and limited sunlight. The rover's resilience highlights the unpredictability and challenges of space exploration.

What technique did researchers use to study the pair of massive galaxies from the early universe?

• Gravitational lensing

• Radio wave analysis

• Infrared spectroscopy

• X-ray imaging

How does the mass of the larger galaxy compare to the Milky Way?

• It is about the same as the Milky Way

• It is 3 to 5 times more massive than the Milky Way

• It is half the mass of the Milky Way

• It is 10 times more massive than the Milky Way

What is the primary power source for the Opportunity Rover on Mars?

• Hydrogen fuel cells

• Solar panels

• Wind turbines

• Nuclear power

What was a significant challenge for the Opportunity Rover during Martian winters?

• Lack of communication with Earth

• Extreme cold temperatures

• Dust accumulation on solar panels

• Mechanical failures

How often do continent-sized dust storms occur on Mars?

• Every 5 Earth years

• Every 2 Martian years

• Every 3 Martian years

• Every 10 Earth years