Sentence examples for eye visibility from inspiring English sources

For saturation pressure measurements, the light source from the lateral window of the equilibrium cell is turned on and a digital microscope with infrared device accurately allows recording precise phase transitions at low (or even without eye) visibility.

The comet was very prominent throughout early March, before fading away to almost below naked eye visibility by the beginning of April.

From 1995 to 2006, Uranus's apparent magnitude fluctuated between +5.6 and +5.9, placing it just within the limit of naked eye visibility at +6.5.

It is not possible to estimate the chances of another very bright Kreutz comet arriving in the near future, but given that at least 10 have reached naked eye visibility over the last 200 years, another great comet from the Kreutz family seems almost certain to arrive at some point.

The detection sensitivity is much lower than the eye visibility threshold, estimated at 300 nmol × L−1 on the same object.

Whatever the choice, G4 or G5, the sensitivity increases by a factor 10 compared to the eye visibility threshold estimated at about 300 nmol × L−1.

Neptune appears as a magnitude 7.8 binocular-brightness object in Aquarius as it crosses the meridian at midnight BST tonight, while Uranus verges on naked-eye visibility at magnitude 5.7 in Pisces as it transits at 02 30.

If the trend continues, it could attain the sixth magnitude, the verge of naked-eye visibility, by the 20th and fifth magnitude by the year's end though the brightening Moon will not aid its visibility.

The comet faded from naked-eye visibility by early February 1681. .

It may reach naked-eye visibility in another few days or week.

During rare perihelic oppositions, Pallas can reach a magnitude of +6.4, right on the edge of naked-eye visibility.